Publications by authors named "Alexandre Abizaid"

270 Publications

Comparative clinical performance of two types of drug-eluting stents with abluminal biodegradable polymer coating: Five-year results of the DESTINY randomized trial.

Rev Port Cardiol 2021 Feb 2;40(2):71-76. Epub 2021 Jan 2.

Heart Institute (InCor), University of São Paulo Medical School, São Paulo, SP, Brazil; Hospital Israelita Albert Einstein, São Paulo, SP, Brazil. Electronic address:

Introduction And Objectives: The Stents Coated With the Biodegradable Polymer on Their Abluminal Faces and Elution of Sirolimus Versus Biolimus Elution for the Treatment of de Novo Coronary Lesions - DESTINY Trial is a non-inferiority randomized study that compared the Inspiron™ sirolimus-eluting stent (SES) with the control Biomatrix™ Flex biolimus-eluting stent (BES). Previous reports in the first year showed similar outcomes for both stents, in clinical, angiographic, optical coherence tomography, and intravascular ultrasound assessments. The present analysis aims to compare the clinical performance of these two biodegradable polymer drug-eluting stents five years after the index procedure.

Methods: A total of 170 patients (194 lesions) were randomized in a 2:1 ratio for treatment with SES or BES, respectively. The primary endpoint for the present study was the five-year rate of combined major adverse cardiac events, defined as cardiac death, myocardial infarction, or target lesion revascularization.

Results: At five years, the primary endpoint occurred in 12.5% and 17.9% of the SES and BES groups, respectively (p=0.4). There was no definite or probable stent thrombosis among patients treated with the novel SES stent during the five years of follow-up, and no stent thrombosis after the first year in the BES group.

Conclusions: The novel Inspiron™ stent had similar good clinical performance in long-term follow-up when compared head-to-head with the control latest-generation Biomatrix™ Flex biolimus-eluting stent.
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http://dx.doi.org/10.1016/j.repc.2020.05.017DOI Listing
February 2021

Imaging and 2-year clinical outcomes of thin strut sirolimus-eluting bioresorbable vascular scaffold: The MeRes-1 extend trial.

Catheter Cardiovasc Interv 2020 Dec 2. Epub 2020 Dec 2.

Division of Cardiology, New York University School of Medicine, New York, New York, USA.

Objectives: This study explores the safety and efficacy of thin strut MeRes100 sirolimus-eluting bioresorbable vascular scaffold (BRS) in patients with de novo coronary artery lesions.

Background: In interventional cardiology, the emergence of BRS technology is catalyzing the next paradigm shift.

Methods: The MeRes-1 Extend was a multicenter, prospective, single-arm, open-label study enrolling 64 patients in Spain, Macedonia, Brazil, South Africa, Malaysia, and Indonesia. The safety endpoint was major adverse cardiac events (MACE) which composed of cardiac death, myocardial infarction (MI), and ischemia-driven target lesion revascularization (ID-TLR). The imaging efficacy endpoint was mean in-scaffold late lumen loss (LLL) evaluated by quantitative coronary angiography (QCA). Optical coherence tomography (OCT) imaging was performed at baseline and 6-month follow-up.

Results: A total of 69 target lesions were identified in 64 enrolled patients (mean age 58.30 ± 9.02 years). Of the treated lesions, 49 (71.01%) lesions were of type B2/C. Procedural and device success was achieved in 64 and 62 patients, respectively. At 2-year follow-up, MACE was reported in one patient (1.61%) in the form of ID-TLR. There was no case of MI, cardiac death or scaffold thrombosis through 2-year. In a subset of 32 patients, paired QCA showed mean in-scaffold LLL of 0.18 ± 0.31 mm at 6-month follow-up. In a subset of 21 patients, OCT revealed 97.95 ± 3.69% strut coverage with mean scaffold area of 7.56 ± 1.79 mm and no evidence of strut malapposition.

Conclusions: The clinical and imaging outcomes of MeRes-1 Extend trial demonstrated favorable safety and efficacy of MeRes100 sirolimus-eluting BRS in patients with de novo coronary artery lesions.
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http://dx.doi.org/10.1002/ccd.29396DOI Listing
December 2020

Healing and early stent coverage after ultrathin strut biodegradable polymer-coated sirolimus-eluting stent implantation: SiBi optical coherence tomography study.

Catheter Cardiovasc Interv 2020 Nov 28. Epub 2020 Nov 28.

Department of Cardiology, Shree B. D. Mehta Mahavir Heart Institute, Surat, India.

Aims: The aim of SiBi study was to evaluate the early vascular healing and neointimal coverage after implantation of ultrathin (60 μm) biodegradable polymer-coated Tetriflex (Sahajanand Medical Technologies Pvt. Ltd., Surat, India) sirolimus-eluting stent (SES) using optical coherence tomography (OCT) at 4 to 6 weeks after implantation.

Methods: SiBi was a single-center, observational, investigator-initiated study. From January 15, 2018 to April 15, 2018, total 29 consecutive patients who had consented and underwent OCT examination at 4-6 weeks after Tetriflex SES implantation were enrolled. All OCT images were analyzed at an independent core laboratory by analysts who were blinded to patient and procedural information.

Results: Of 29 patients, four patients were excluded, as those OCT images were technically inadequate for analysis. Therefore, 25 patients were included in final OCT analysis. Average OCT analysis was performed after 35.3 ± 5 days of Tetriflex implantation. Total 14,024 stent struts in 1,520 cross sections were analyzed. Strut tissue coverage was observed in 91.26 ± 5.53% of struts and malapposed struts were seen in 0.89 ± 1.67%. The mean neointimal hyperplasia (NIH) thickness on the covered struts was 50 ± 30 μm.

Conclusion: A large percentage of struts were found to be covered with thin layer of NIH evenly distributed along the stent length at around 1 month from stent implantation. The results of this pilot study serve as ethical and scientific backbone to conduct an adequately powered clinical trial to evaluate outcomes of short dual-antiplatelet therapy in context of ultrathin strut stent.
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http://dx.doi.org/10.1002/ccd.29371DOI Listing
November 2020

One-Month Dual Antiplatelet Therapy Following Percutaneous Coronary Intervention With Zotarolimus-Eluting Stents in High-Bleeding-Risk Patients.

Circ Cardiovasc Interv 2020 11 10;13(11):e009565. Epub 2020 Nov 10.

Cardiovascular Research Foundation, New York, NY (A.J.K., G.W.S.).

Background: Despite treatment guidance endorsing shortened dual antiplatelet therapy (DAPT) duration in high bleeding risk (HBR) patients after drug-eluting stents, limited evidence exists to support these recommendations. The present study was designed to examine the safety and effectiveness of 1-month DAPT duration following percutaneous coronary intervention with zotarolimus-eluting stents in HBR patients.

Methods: Onyx ONE Clear was a prospective, multicenter, nonrandomized study evaluating the safety and effectiveness of 1-month DAPT followed by single antiplatelet therapy in HBR patients undergoing percutaneous coronary intervention with Resolute Onyx drug-eluting stents. The primary analysis of cardiac death or myocardial infarction between 1 month and 1 year was performed in the prespecified one-month clear population of patients pooled from the Onyx ONE US/Japan study and Onyx ONE randomized controlled trial. One-month clear was defined as DAPT adherence and without major adverse events during the first month following percutaneous coronary intervention.

Results: Among patients enrolled in Onyx ONE US/Japan (n=752) and Onyx ONE randomized controlled trial (n=1018), 1506 patients fulfilled one-month clear criteria. Mean HBR characteristics per patient was 1.6 with 44.7% having multiple risks. By 2 months and 1 year, respectively, 96.9% and 89.3% of patients were taking single antiplatelet therapy. Between 1 month and 1 year, the rate of the primary end point was 7.0%. The 1-sided upper 97.5% CI was 8.4%, less than the performance goal of 9.7% (<0.001).

Conclusions: Among HBR patients who were event free before DAPT discontinuation at 1 month, favorable safety and effectiveness through 1 year support treatment with Resolute Onyx drug-eluting stents as part of an individualized strategy for shortened DAPT duration following percutaneous coronary intervention. Registration: URL: https://www.clinicaltrials.gov; Unique identifier NCT03647475.
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http://dx.doi.org/10.1161/CIRCINTERVENTIONS.120.009565DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7665241PMC
November 2020

Vascular Closure Devices Attenuate Femoral Access Complications of Primary Percutaneous Coronary Intervention.

J Invasive Cardiol 2020 Oct;32(10):364-370

Santa Casa de Marília, Avenida Vicente Ferreira, 828, Marília - São Paulo, Brazil.

Objectives: To compare severe complications related to radial access and those related to femoral access using vascular closure devices for patients undergoing primary percutaneous coronary intervention (PCI).

Background: Femoral artery access is still used for acute myocardial infarction management; studies comparing state-of-the-art radial and femoral techniques are required to minimize bias regarding the outcomes associated with operator preferences.

Methods: We performed a randomized study comparing radial access with a compression device and anatomic landmark-guided femoral access with a hemostatic vascular closure device. The severe complication rates related to the access site were assessed until hospital discharge. A meta- analysis including studies with comparable populations reporting severe bleeding and major adverse cardiovascular event rates was performed.

Results: A total of 250 patients were included who underwent PCI between January 2016 and February 2019. Mean age was 61.5 ± 12.2 years, 73.2% were men, and 28.4% had diabetes. There were no differences between groups or in vascular access-related severe complication rates (8.0% for femoral group vs 5.6% for radial group; P=.45). Although radial access was associated with decreased vascular complications related to the access site when compared with the femoral approach (relative risk [RR], 0.64; 95% confidence interval [CI], 0.43-0.95), the meta-analysis did not show an impact on severe bleeding (RR, 0.74; 95% CI, 0.37-1.46) or severe cardiovascular adverse events (RR, 0.69; 95% CI, 0.30-1.58).

Conclusions: Compliance with femoral artery puncture techniques and routine use of a vascular closure device promoted low severe complication rates.
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October 2020

Twelve-month clinical and imaging outcomes of the uncaging coronary DynamX bioadaptor system.

EuroIntervention 2020 Dec 18;16(12):e974-e981. Epub 2020 Dec 18.

Interventional Cardiology, ZNA Cardiovascular Center Middelheim, Antwerp, Belgium.

Aims: We aimed to assess the safety and efficacy of the DynamX Novolimus-Eluting Coronary Bioadaptor System, a novel device that initially acts as a second-generation drug-eluting stent, but after six months frees the vessel through uncaging elements.

Methods And Results: This multicentre study enrolled 50 patients with single de novo lesions. In-device acute lumen gain was 1.61±0.34 mm, and device and procedure success was 100%. Up to 12 months, two target lesion failures occurred: both were cardiac deaths (day 255 and day 267 post procedure). No definite or probable device thrombosis was observed. Mean late lumen loss was 0.12±0.18 mm in-device and 0.11±0.16 mm in-segment. Per intravascular ultrasound, the mean device area and mean vessel area increased significantly by 5% and 3%, respectively, while the mean lumen area was maintained. Stationary optical coherence tomography in seven patients demonstrated restoration of cyclic pulsatility, with an approximate lumen area variance of 11% between systole and diastole.

Conclusions: The DynamX bioadaptor showed drug-eluting stent-like acute performance and safety and efficacy up to one year. Positive remodelling with an increase of vessel and device area while maintaining the mean lumen area was demonstrated. Long-term follow-up and randomised trials are required to assess the benefit of this device on events beyond one year.
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http://dx.doi.org/10.4244/EIJ-D-20-00763DOI Listing
December 2020

Cardiovascular Imaging and Interventional Procedures in Patients with Novel Coronavirus Infection.

Arq Bras Cardiol 2020 07 7;115(1):111-126. Epub 2020 Aug 7.

Instituto do Câncer do Estado de São Paulo, Universidade de São Paulo, São Paulo, SP, Brasil.

The coronavirus disease 2019 (COVID-19) pandemic is a huge challenge to the health system because of the exponential increase in the number of individuals affected. The rational use of resources and correct and judicious indication for imaging exams and interventional procedures are necessary, prioritizing patient, healthcare personnel, and environmental safety. This review was aimed at guiding health professionals in safely and effectively performing imaging exams and interventional procedures.
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http://dx.doi.org/10.36660/abc.20200370DOI Listing
July 2020

Effect of Preloading With High Dose of Rosuvastatin on Serum Levels of Inflammatory Markers After Percutaneous Coronary Intervention.

J Invasive Cardiol 2020 Sep 22;32(9):335-341. Epub 2020 Jun 22.

Av. Dr. Dante Pazzanese, 500-Vila Mariana, São Paulo, SP, Brasil, CEP 04012-180.

Objectives: We sought to assess the effects of a high loading dose of rosuvastatin (40 mg) on acute inflammatory response after coronary stenting.

Methods: Patients with stable coronary disease without statin use (≥7 days) and undergoing elective percutaneous coronary intervention (PCI) in a native coronary artery were randomized to receive a loading dose of rosuvastatin (n = 64) or not (n = 61). Blood samples were obtained before statin intake (time point A), 3 hours after medication (time point B), and 3 hours after PCI (time point C). The primary goal was the comparison in the variation of the serum inflammatory markers and their gene expression at the different time points between the two groups.

Results: Baseline clinical, angiographic, and procedural characteristics did not significantly differ between the groups, except for the more frequent use of postdilation in the control group (73.4% vs 90.2%; P=.02). Patients pretreated with statin showed a reduction in the serum levels of interleukin (IL)-1β (Δ = -0.491 pg/mL; Pinteraction<.001), IL-6 (Δ = -0.209 pg/mL; Pinteraction<.001), and plasminogen activator inhibitor 1 (Δ = -1.573 pg/mL; Pinteraction<.001) as well as in their genetic expression, which was not observed in the control group. Regarding high-sensitivity c-reactive protein, there was no significant variation in its value from time point A to C in patients pretreated with statin (P=.58) while it significantly increased in the control group (P=.04).

Conclusions: Among patients with stable coronary artery disease undergoing PCI with stents, pretreatment with high dose of rosuvastatin resulted in significant reduction in the serum levels of important inflammatory markers and their genetic expression.
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September 2020

Percutaneous endovascular delivery of calcium chloride to the intact porcine carotid artery: A novel animal model of arterial calcification.

Catheter Cardiovasc Interv 2020 10 19;96(4):E484-E492. Epub 2020 Jun 19.

Heart Institute (InCor), University of São Paulo Medical School, Sao Paulo, Brazil.

Objective: The present study evaluated the effect of endovascular administration of calcium chloride to the carotid artery of swines, to create a model of arterial calcification.

Methods: Fifteen Large White pigs were used for the study. Via endovascular treatment, carotid arteries were exposed during 9 min to either calcium chloride (experimental artery) or saline (control artery) with the use of the TAPAS catheter. Intravascular ultrasound (IVUS) imaging was obtained at baseline, postprocedure and at 30 days. Optical coherence tomography (OCT) imaging was obtained in vitro after carotids were harvested. Longitudinally cut parallel arterial segments were placed in a system of delicate clamps and underwent uniaxial strain test. All arteries underwent histopathological examination.

Results: Calcium chloride treated segments showed extensive circumferential parietal calcification evident on both IVUS and OCT. Reduction in minimal lumen area on IVUS was evident in experimental arteries both at 24 hr and 30 days postprocedure. Histopathologic assessment (Von Kossa stain) confirmed medial calcification with mild intimal thickening. Biomechanical testing showed treated segments to have smaller breaking strength and less elastic deformation than controls.

Conclusion: We developed a nonexpensive, reproducible model of early carotid medial calcification in pigs. Our model has the potential to help the development of research to unravel mechanisms underlying arterial calcification, the use of current or new devices to treat calcified lesions as well as to serve as an option for training interventionalists on the use of such devices.
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http://dx.doi.org/10.1002/ccd.29070DOI Listing
October 2020

Mid- to long-term clinical and echocardiographic outcomes after transcatheter aortic valve replacement with a new-generation, self-expandable system.

Catheter Cardiovasc Interv 2021 Jan 23;97(1):167-174. Epub 2020 May 23.

Invasive Cardiology section, Instituto Dante Pazzanese de Cardiologia, São Paulo, Brazil.

Objectives: The aim of the study was to evaluate mid- to late clinical and echocardiographic outcomes after transcatheter aortic valve replacement (TAVR) with Acurate neo™ (Boston Scientific, Boston, MA).

Background: TAVR is an established treatment for aortic stenosis (AS). Few data exist on mid- to long-term outcomes and durability after new-generation valves.

Methods: All consecutive patients (n = 104) who underwent Acurate neo™ implantation from 2012 to 2018 were included. Follow-up was systematically performed at 1, 6, 12, and 24 months and yearly thereafter. Outcomes were reported according to VARC-2, and structural valve deterioration (SVD) or bioprosthetic valve failure defined accordingly to new definitions.

Results: Mean age was 82 ± 5.4 years, 56.7% were female and the Society of Thoracic Surgeons score for mortality was 5.9 ± 4%. Patients were followed for a median of 3 years (1,092 days; IQR 1.5-4 years), and the maximum follow-up was 7 years. All-cause mortality values at 1 and 5 years were 8.5% and 40.5%, respectively. No relevant changes in mean gradient and orifice area occurred (7.9 ± 3.8 mmHg and 1.9 ± 0.3 cm at 1 year; 6.6 ± 2.1 mmHg and 1.8 ± 0.3 cm at 5 years), and there was a significant rate of paravalvular leaks resolution at 1, 2, and 3 years (p = .004; p < .001; p < .001, respectively). None of the patients had leaflet thrombosis or endocarditis. One patient developed SVD at 84 months.

Conclusions: Acurate neo™ was associated with sustained echocardiographic results. Reassuring mid- to long-term outcomes was observed in this cohort of elderly patients with severe AS.
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http://dx.doi.org/10.1002/ccd.28999DOI Listing
January 2021

Predictive role of Selvester QRS score in patients undergoing transcatheter aortic valve replacement.

Catheter Cardiovasc Interv 2021 Jan 16;97(1):E95-E103. Epub 2020 Apr 16.

Dante Pazzanese Institute of Cardiology, São Paulo, São Paulo, Brazil.

Introduction: Few data exist regarding the late clinical impact of the Selvester score prediction of myocardial fibrosis after transcatheter aortic valve replacement (TAVR). This study evaluated the predictive power of the Selvester score on survival in patients with aortic stenosis (AS) undergoing TAVR.

Methods And Results: Patients with severe AS who had preoperative electrocardiograms were included. Clinical follow-up was obtained retrospectively. The primary endpoint was all-cause mortality. Secondary endpoints were cardiovascular death and major adverse cardiac events (MACEs). Two-hundred twenty-eight patients were included (mean age, 81.5 ± 7.4 years; women, 58.3%). Deceased patients had a higher mean score (4.6 ± 3.2 vs. 1.4 ± 1.3; p < .001). At a mean follow-up of 36.2 ± 21.2 months, the Selvester score was independently associated with all-cause mortality (hazard ratio [HR], 1.65; 95% confidence interval [CI], 1.48-1.84; p < .001), cardiovascular death (HR, 1.59; 95% CI, 1.38-1.74; p < .001), and MACE (HR, 1.55; 95% CI, 1.30-1.68; p < .001). After 5 years, the mortality risk was incrementally related to the Selvester score. The involvement of the inferior wall of the left ventricle was a lower mortality risk factor (HR, 0.42; 95% CI, 0.18-0.98; p = .046). For a Selvester score of 3, the area under the curve showed 0.92, 0.94, and 0.86 (p < .001), respectively, for 1, 2, and 3 years.

Conclusions: Elevated Selvester scores increase the risk of poor outcomes in patients with AS undergoing TAVR. The involvement of the anterior or lateral wall presents worse prognosis.
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http://dx.doi.org/10.1002/ccd.28905DOI Listing
January 2021

Novel Prognostic Score for Immediate and Late Success After Percutaneous Mitral Balloon Commissurotomy in Patients With Mitral Stenosis.

J Invasive Cardiol 2020 Jun 9;32(6):211-217. Epub 2020 Apr 9.

Department of Interventional Cardiology, Instituto Dante Pazzanese de Cardiologia, Av Dante Pazzanese, n. 500, 04012-909 Sao Paulo, Brazil.

Objectives: Percutaneous mitral balloon commissurotomy (PMBC) remains the preferred treatment for patients with severe symptomatic rheumatic mitral stenosis (MS) and suitable anatomy. The objective of this study was to propose a new score for the prediction of immediate and late success.

Methods: This is a single-center, retrospective analysis of all 1582 patients with severe mitral stenosis who underwent PMBC from August 1987 to July 2010. The composite outcome was cardiovascular death, new PMBC, or mitral valve repair surgery up to 24 years of follow-up.

Results: Mean patient age was 36.8 ± 12.9 years, most (86.4%) were female, and Wilkins score was between 9-11 in 49.1% of patients. In the multivariate analysis, the predictors of immediate success were age (odds ratio [OR], 0.98; 95% confidence interval [CI], 0.96-0.99; P=.01), left atrium size (OR, 0.96; 95% CI, 0.93-0.99; P=.01), mean preprocedure mitral gradient (OR, 0.93; 95% CI, 0.89-0.96; P<.001), intermediate Wilkins score 9-11 (OR, 0.62; 95% CI, 0.40-0.94; P=.02), and high Wilkins score ≥12 (OR, 0.35; 95% CI, 0.16-0.76; P<.01). For prediction of late events, age (hazard ratio [HR], 0.98; 95% CI, 0.97-0.98; P<.001), New York Heart Association class III-IV (HR, 1.50; 95% CI, 1.18-1.92; P<.001), left atrium size (HR, 1.02; 95% CI, 1.02-0.04; P<.01), and high Wilkins score ≥12 (HR, 2.02; 95% CI, 1.30-3.15; P<.01) were significant. Two nomograms were developed using significant predictors from the model.

Conclusions: In this large population, not only the Wilkins score, but also clinical and hemodynamic features, seem to be relevant in predicting immediate and late success for patients with rheumatic MS who underwent PMBC.
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June 2020

Comparison of neointimal coverage between ultrathin biodegradable polymer-coated sirolimus-eluting stents and durable polymer-coated everolimus-eluting stents: 6 months optical coherence tomography follow-up from the TAXCO study.

Catheter Cardiovasc Interv 2021 Feb 3;97(3):423-430. Epub 2020 Apr 3.

Department of Cardiology, Shree B.D. Mehta Mahavir Heart Institute, Surat, Gujarat, India.

Aim: The TAXCO study was designed to compare the degree of neointimal coverage and the prevalence of malapposition at 6 months subsequent to implantation of ultrathin biodegradable polymer-coated sirolimus-eluting stents (SES) and durable polymer-coated everolimus-eluting stents (EES) of thin strut thickness using optical coherence tomography (OCT).

Methods: The TAXCO study included a total of 42 patients who gave consent and underwent OCT examination between August 2017 and September 2017. Of 42, five patients' OCT examinations were of insufficient quality for quantitative analysis. Thus, the OCT analysis group consisted of 37 patients. Among them, 16 patients were treated with Xience (Abbott Vascular) and 21 with Tetriflex (Sahajanand Medical Technologies Pvt. Ltd., Surat, India), 6 (±1) months earlier at our institution. The OCT was performed using a C7 Dragonfly™ imaging catheter (St. Jude Medical Inc.). All OCT images were analyzed at an independent core laboratory (Cardiovascular Research Center, São Paulo, Brazil) by analysts who were blinded to patient and procedural information.

Results: A total of 763 crosssections (6,882 struts) were analyzed in Xience group, and 1,127 crosssections (9,968 struts) in Tetriflex group. At 6 months, on per-lesion basis, no significant differences were observed between Xience group and Tetriflex group in mean percentage of uncovered struts (1.87 ± 3.86 vs. 2.42 ± 3.46, p = .137) and malapposed struts (0.05 ± 0.2 vs. 0.21 ± 0.69, p = .302). Strut-level neointimal thickness also did not differ between Xience group and Tetriflex group (0.18 ± 0.12 vs. 0.14 ± 0.08 mm, p = .286).

Conclusion: This OCT study found no significant difference in strut coverage and neointimal thickness at 6 months after implantation of biodegradable polymer-coated Tetriflex, when compared with durable polymer-coated Xience.
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http://dx.doi.org/10.1002/ccd.28833DOI Listing
February 2021

Invasive Physiological Assessment: From Binary to Continuous.

Arq Bras Cardiol 2020 02;114(2):265-267

Invasive Cardiology Department, Instituto Dante Pazzanese de Cardiololgia, São Paulo, SP - Brazil.

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http://dx.doi.org/10.36660/abc.20200054DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7077562PMC
February 2020

Comparison of Minimum Pressure and Patent Hemostasis on Radial Artery Occlusion After Transradial Catheterization.

J Invasive Cardiol 2020 Apr 11;32(4):147-152. Epub 2020 Mar 11.

Instituto de Cardiologia de Santa Catarina, Rua Adolfo Donato da Silva, s/n. Praia Comprida, São José, Santa Catarina. CEP 88103-901.

Objectives: The aim of this study was to compare two hemostatic techniques, minimum pressure technique and patent hemostasis, on radial artery occlusion (RAO) after transradial catheterization.

Background: RAO is an infrequent complication of transradial procedures. One of the strategies used to reduce this complication is the patent hemostasis technique. Use of minimum pressure in hemostatic wristband, without monitoring patency, might have the same efficacy for preventing RAO.

Methods: This is a multicenter study encompassing patients submitted to transradial catheterization. After pneumatic wristband application, the band was deflated to the lowest allowable volume while preserving hemostasis. Radial artery patency was subsequently evaluated. The group with no return of plethysmographic curve was labeled "minimum pressure," and the group in which the signal returned was labeled "patent hemostasis." RAO was verified by Doppler evaluation within the first 24 hours of the procedure.

Results: A total of 1082 patients were enrolled, with mean age of 61.4 ± 10.4 years. The majority (61.0%) were male and 34.5% had diabetes. Patent hemostasis was achieved in only 213 cases (20%). Early RAO occurred in 16 patients (1.8%) in the minimum pressure group and in 4 patients (1.9%) in the patent hemostasis group (P=.97). No major bleeding was observed among the entire cohort. EASY scale for hematoma grade was similar between the cohorts (EASY grades 1-3: 7.0% in the minimum pressure group vs 7.5% in the patent hemostasis group; P=.96).

Conclusion: Checking radial patency during hemostatic compression may not be necessary after the procedure when adopting a mild and short hemostatic compression.
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April 2020

Impact of Predilatation Prior to Transcatheter Aortic Valve Implantation With the Self-Expanding Acurate neo Device (from the Multicenter NEOPRO Registry).

Am J Cardiol 2020 05 8;125(9):1369-1377. Epub 2020 Feb 8.

Department of Cardiology, Montefiore Medical Center, New York, New York; Division of Cardiology, Department of Medicine, University of Cape Town, Cape Town, South Africa. Electronic address:

Safety and feasibility of transfemoral Acurate neo implantation without systematic predilatation are not fully investigated. Our aim was to evaluate the use and impact of pre-implantation balloon aortic valvuloplasty (pre-BAV) before transcatheter aortic valve implantation (TAVI) with Acurate neo. The NEOPRO Registry retrospectively included 1,263 patients who underwent transfemoral TAVI with Acurate neo at 18 centers between January 2012 and March 2018. Information on pre-BAV was available for 1,262 patients (99.9%). Primary end points were pre-discharge moderate-to-severe paravalvular aortic regurgitation (PAR II+), 30-day new permanent pacemaker implantation, and 30-day all-cause mortality or stroke. A total of 1,262 patients who underwent TAVI with (n = 1,051) or without predilatation (n = 211) were included. A reduction in the pre-BAV rate was observed during the study period (from 95.7% in the first date quintile to 78.4% in the last date quintile). Patients who underwent pre-BAV had higher degrees of aortic valve (AV) and left ventricular outflow tract (LVOT) calcification. Primary endpoints were similar between pre-BAV and no pre-BAV groups (PAR II+ 5.5% vs 3.4%, p = 0.214; 30-day permanent pacemaker implantation 9.0% vs 8.0%, p = 0.660; 30-day death or stroke 4.9% vs 4.4%, p = 0.743). The need for postdilatation and other procedural outcomes were comparable between groups. Predilatation did not have a significant impact on primary endpoints across AV and LVOT calcification subgroups (subgroup analyses) and was not independently associated with primary endpoints (multivariate analyses). In conclusion, transfemoral Acurate neo implantation without predilatation appears to be feasible and safe, especially in patients with milder degrees of AV and LVOT calcification.
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http://dx.doi.org/10.1016/j.amjcard.2020.02.003DOI Listing
May 2020

Long-term serial functional evaluation after implantation of the Fantom sirolimus-eluting bioresorbable coronary scaffold.

Catheter Cardiovasc Interv 2021 Feb 20;97(3):431-436. Epub 2020 Feb 20.

Yale University School of Medicine, New Haven, Connecticut, USA.

Background: Quantitative flow ratio (QFR) has been validated as an accurate surrogate of standard wire-based fractional flow reserve. The clinical and angiographic outcomes of the Fantom sirolimus-eluting bioresorbable coronary scaffold (BRS) have been previously studied and reported. We investigate the functional performance of the Fantom BRS.

Methods: The FANTOM II trial prospectively enrolled 240 patients with stable coronary artery disease or unstable angina, of which 235 patients received the Fantom BRS and were included in the present analysis. We performed an independent serial QFR analysis of the target vessel at baseline, post-percutaneous coronary intervention (PCI), and at 6- or 9-month and 24-month follow-up, using a QFR threshold ≤0.80 to define functional ischemia.

Results: QFR was analyzable in 178 patients at baseline, 185 post-PCI, 178 at 6- or 9-month follow-up, and 30 at 24-month follow-up. At baseline, 119 patients (66.9%) had a QFR ≤0.80, whereas 12 (6.5%) post-PCI, 13 (7.3%) at 6- or 9-month follow-up, and 3 (10.0%) at 24-month follow-up had a QFR ≤0.80. QFR improved from baseline to post-PCI, and decreased from post-PCI up to 24-month follow-up. During follow-up period, 28 patients (11.9%) had target vessel revascularization, of which 21 had analyzable QFR and 16 patients (76.1%) had QFR ≤0.80 at the time of revascularization.

Conclusions: Off-line serial QFR assessment demonstrated that around 30% patients did not have functionally significant lesions at baseline and the time with target vessel revascularization. PCI with the Fantom BRS improved functional ischemia with a slight decrease in QFR values over 24 months.
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http://dx.doi.org/10.1002/ccd.28804DOI Listing
February 2021

Polymer-based or Polymer-free Stents in Patients at High Bleeding Risk.

N Engl J Med 2020 03 12;382(13):1208-1218. Epub 2020 Feb 12.

From Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland (S.W.); Montefiore Medical Center (A.L.), Columbia University Irving Medical Center-New York-Presbyterian Hospital (A.J.K., S.O.M.), the Cardiovascular Research Foundation (A.J.K., S.O.M., I.J., G.W.S.), Mount Sinai Medical Center (R. Mehran), and the Zena and Michael A. Wiener Cardiovascular Institute, Icahn School of Medicine at Mount Sinai (G.W.S.) - all in New York; Isala Zwolle, Zwolle, the Netherlands (E.K.); Medical University of Silesia, Katowice (E.K.), and Poland Miedziowe Centrum Zdrowia, Lubin (A.W.) - both in Poland; Piedmont Heart Institute, Atlanta (D.E.K.); the Division of Cardiovascular Diseases, Scripps Clinic, La Jolla (M.J.P.), and Medtronic, Santa Rosa (S.B., L.B., M.L.) - both in California; Instituto Dante Pazzanese de Cardiologia, São Paulo (A. Abizaid); University Hospitals Cleveland Medical Center, Cleveland (D.I.S.); GenesisCare Cardiology, Alexandria, NSW (S.G.W.), and St. Andrew's Hospital, Adelaide, SA (C.T.) - both in Australia; Freeman Hospital and Newcastle University, Newcastle upon Tyne, United Kingdom (A.Z.); Stredoslovensky Ustav Srdcovych a Cievnych Chorob, Banska Bystrica, Slovakia (M.H., P.P.); Hospital Serdang, Kajang, Malaysia (A.K.A.G., K.S.); Acibadem City Clinic, Sofia, Bulgaria (I.P.); Galway University Hospitals-University Hospital Galway, Galway, Ireland (D.M.); Hospital Clínico Universitario Virgen de la Arrixaca, El Palmar (E.P.), and Hospital Universitario La Paz and Hospital La Paz Institute for Health Research, Madrid (R. Moreno) - all in Spain; Centro Cardiologico Monzino IRCCS, Milan (F.F.); Waikato Hospital, Hamilton, New Zealand (S.P.); Seoul National University Hospital, Seoul (H.-S.K.), and Keimyung University Dongsan Medical Center, Daegu (S.-H.H.) - both in South Korea; and Centre Hospitalier Universitaire Charleroi, Charleroi, Belgium (A. Aminian).

Background: Polymer-free drug-coated stents provide superior clinical outcomes to bare-metal stents in patients at high bleeding risk who undergo percutaneous coronary intervention (PCI) and are treated with 1 month of dual antiplatelet therapy. Data on the use of polymer-based drug-eluting stents, as compared with polymer-free drug-coated stents, in such patients are limited.

Methods: In an international, randomized, single-blind trial, we compared polymer-based zotarolimus-eluting stents with polymer-free umirolimus-coated stents in patients at high bleeding risk. After PCI, patients were treated with 1 month of dual antiplatelet therapy, followed by single antiplatelet therapy. The primary outcome was a safety composite of death from cardiac causes, myocardial infarction, or stent thrombosis at 1 year. The principal secondary outcome was target-lesion failure, an effectiveness composite of death from cardiac causes, target-vessel myocardial infarction, or clinically indicated target-lesion revascularization. Both outcomes were powered for noninferiority.

Results: A total of 1996 patients at high bleeding risk were randomly assigned in a 1:1 ratio to receive zotarolimus-eluting stents (1003 patients) or polymer-free drug-coated stents (993 patients). At 1 year, the primary outcome was observed in 169 of 988 patients (17.1%) in the zotarolimus-eluting stent group and in 164 of 969 (16.9%) in the polymer-free drug-coated stent group (risk difference, 0.2 percentage points; upper boundary of the one-sided 97.5% confidence interval [CI], 3.5; noninferiority margin, 4.1; P = 0.01 for noninferiority). The principal secondary outcome was observed in 174 patients (17.6%) in the zotarolimus-eluting stent group and in 169 (17.4%) in the polymer-free drug-coated stent group (risk difference, 0.2 percentage points; upper boundary of the one-sided 97.5% CI, 3.5; noninferiority margin, 4.4; P = 0.007 for noninferiority).

Conclusions: Among patients at high bleeding risk who received 1 month of dual antiplatelet therapy after PCI, use of polymer-based zotarolimus-eluting stents was noninferior to use of polymer-free drug-coated stents with regard to safety and effectiveness composite outcomes. (Funded by Medtronic; ONYX ONE ClinicalTrials.gov number, NCT03344653.).
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http://dx.doi.org/10.1056/NEJMoa1910021DOI Listing
March 2020

Comparison of clinical outcomes between Magmaris and Orsiro drug eluting stent at 12 months: Pooled patient level analysis from BIOSOLVE II-III and BIOFLOW II trials.

Int J Cardiol 2020 02 6;300:60-65. Epub 2019 Nov 6.

Lukaskrankenhaus Neuss, Neuss, Germany.

Background: The aim of this study was to compare the 12-month clinical outcomes of patients treated with Magmaris or Orsiro. Second generation drug-eluting absorbable metal scaffold Magmaris (Dreams 2G) has proved to be safe and effective in the BIOSOLVE-II study. Similarly, biodegradable polymer sirolimus-eluting stent, Orsiro has shown notable clinical results even in all-comer populations.

Methods: Magmaris group patients were taken from the BIOSOLVE-II and BIOSOLVE-III trials, while the patients from Orsiro group were enrolled in BIOFLOW-II trial. The primary outcome was explored using a time-to-event assessment of the unadjusted clinical outcomes for target lesion failure (TLF) at 12 months, followed by a multivariate analysis adjusting for all the significantly different covariates between the groups.

Results: The study population consisted of 482 patients (521 lesions), 184 patients (189 lesions) in Magmaris group and 298 patients (332 lesions) in Orsiro group. The mean age was 65.5 ± 10.8 and 62.7 ± 10.4 years in Magmaris and Orsiro groups, respectively (p = 0.005). Magmaris and Orsiro unadjusted TLF rates were 6.0 and 6.4% with no significant difference between the groups (p = 0.869). In the multivariate analysis, there were no meaningful differences between Magmaris and Orsiro groups. Finally, none of the groups presented device thrombosis cases at 12 months.

Conclusion: At 12 months there were no significant differences between Magmaris and Orsiro groups neither in the unadjusted assessment nor in the multivariate analysis for target lesion failure. These results should be taken as hypothesis generating and may warrant a head to head comparison on a randomized fashion.
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http://dx.doi.org/10.1016/j.ijcard.2019.11.003DOI Listing
February 2020

Infective Endocarditis Following Transcatheter Aortic Valve Replacement: Comparison of Balloon- Versus Self-Expandable Valves.

Circ Cardiovasc Interv 2019 11 7;12(11):e007938. Epub 2019 Nov 7.

Quebec Heart & Lung Institute, Laval University, Quebec City, Canada

Background: No data exist about the characteristics of infective endocarditis (IE) post-transcatheter aortic valve replacement (TAVR) according to transcatheter valve type. We aimed to determine the incidence, clinical characteristics, and outcomes of patients with IE post-TAVR treated with balloon-expandable valve (BEV) versus self-expanding valve (SEV) systems.

Methods: Data from the multicenter Infectious Endocarditis After TAVR International Registry was used to compare IE patients with BEV versus SEV.

Results: A total of 245 patients with IE post-TAVR were included (SEV, 47%; BEV, 53%). The timing between TAVR and IE was similar between groups (SEV, 5.5 [1.2-15] months versus BEV, 5.3 [1.7-11.4] months; =0.89). Enterococcal IE was more frequent in the SEV group (36.5% versus 15.4%; <0.01), and vegetation location differed according to valve type (stent frame, SEV, 18.6%; BEV, 6.9%; =0.01; valve leaflet, SEV, 23.9%; BEV, 38.5%; =0.01). BEV recipients had a higher rate of stroke/systemic embolism (20.0% versus 8.7%, adjusted OR: 2.46, 95% CI: 1.04-5.82, =0.04). Surgical explant of the transcatheter valve (SEV, 8.7%; BEV, 13.8%; =0.21), and in-hospital death at the time of IE episode (SEV, 35.6%; BEV, 37.7%; =0.74) were similar between groups. After a mean follow-up of 13±12 months, 59.1% and 54.6% of the SEV and BEV recipients, respectively, had died (=0.66).

Conclusions: The characteristics of IE post-TAVR, including microorganism type, vegetation location, and embolic complications but not early or late mortality, differed according to valve type. These results may help to guide the diagnosis and management of IE and inform future research studies in the field.
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http://dx.doi.org/10.1161/CIRCINTERVENTIONS.119.007938DOI Listing
November 2019

The REMEDEE trial: 5-Year results on a novel combined sirolimus-eluting and endothelial progenitor cells capturing stent.

Catheter Cardiovasc Interv 2020 05 5;95(6):1076-1084. Epub 2019 Sep 5.

Cardiovascular Research Foundation, New York, New York.

Objectives: To evaluate the long-term safety and efficacy of the novel combined sirolimus-eluting endothelial progenitor cell capture Combo stent (OrbusNeich, Fort Lauderdale, FL) at 5 years in the REMEDEE (Randomized study to Evaluate the safety and effectiveness of an abluMinal sirolimus coated bio-Engineered stEnt) trial.

Background: Drug-eluting stents have limited restenosis and reintervention but are complicated by late and very late thrombosis and accelerated neoatherosclerosis. Alternative or adjunctive technologies are needed to address these limitations.

Methods: A total of 183 patients with de novo lesions in native coronary arteries were randomized 2:1 to Combo (n = 124) or Taxus Liberté (n = 59). Primary endpoint was 9 month angiographic in-stent late lumen loss and the secondary endpoint was the occurrence of major adverse events (MACE) through 5-year follow-up.

Results: Compared with Taxus, after 5 years the Combo stent was associated with similar rates of MACE (18.3% vs. 16.9%, p = .89), cardiac death (0.8% vs. 5.1%, p = .07), myocardial infarction (4.1% vs. 3.4%, p = .81), target lesion (9.4% vs. 10.2%, p = .78), and target vessel revascularization (14.4% vs. 11.9%, p = .73). No cases of definite stent thrombosis were reported in the Combo group. The follow-up rate at 5 years was 97.7%.

Conclusion: At 5-year follow-up, the Combo stent remained clinically safe and effective with an overall low rate of MACE comparable to Taxus.
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http://dx.doi.org/10.1002/ccd.28483DOI Listing
May 2020

E/e` ratio is superior to speckle tracking for detecting elevated left ventricular end-diastolic pressure in patients with coronary artery disease and preserved ejection fraction.

Echocardiography 2019 07 27;36(7):1263-1272. Epub 2019 Jun 27.

Department of Echocardiography, Dante Pazzanese Institute of Cardiology, São Paulo, Brazil.

Background: A weak correlation has been reported between left ventricular filling pressures and the traditional echocardiographic tools for the evaluation of diastolic function in patients with coronary artery disease (CAD) and preserved left ventricular ejection fraction (LVEF). On the other hand, studies that compared invasive measurements with speckle tracking echocardiography have shown promising results, but they were not exclusively targeted on this specific population.

Methods And Results: Immediately before the left heart catheterization, a comprehensive two-dimensional Doppler echocardiography and speckle tracking analysis was prospectively performed in outpatients referred for coronary angiography. Left ventricular end-diastolic pressure (LVEDP) was measured before any contrast exposure. Eighty-one patients with coronary artery disease were studied, and the group with high LVEDP (n = 40) showed increased left atrial volume index (22 ± 6 mL/m vs 26 ± 8.26 mL/m , P = 0.04), E-wave velocity (65 ± 15 cm/s vs 78 ± 20 cm/s, P = 0.02), E/e` (average) ratio (8.14 ± 2.0 vs 11.54 ± 2.7, P = 0.03), and E/global circumferential strain rate E peak ratio (E/GCSR ) (39 cm vs 46 cm, P < 0.01). There was a positive correlation between LVEDP and E/e` (ρ = 0.56; P = 0.03), and between LVEDP and E/GCSR ratio (ρ = 0.43; P < 0.01). The area under the receiver operating characteristics (ROC) curve was 0.83 and 0.73, respectively (P < 0.05). E/e` and E/GCSR were both independent predictors of elevated LVEDP (P < 0.05), with a higher C-statistic for the model including E/e` (0.89 vs 0.85).

Conclusion: The E/e` ratio was able to identify elevated LVEDP in CAD patients with preserved LVEF with more accuracy than the E/GCSR ratio.
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http://dx.doi.org/10.1111/echo.14407DOI Listing
July 2019

Rationale and design of the Onyx ONE global randomized trial: A randomized controlled trial of high-bleeding risk patients after stent placement with 1 month of dual antiplatelet therapy.

Am Heart J 2019 08 6;214:134-141. Epub 2019 May 6.

Department of Cardiology, Swiss Cardiovascular Center, Bern University Hospital, Bern, Switzerland.

Background And Rationale: Polymer-free drug-eluting stent (DES) implantation in combination with 1-month dual antiplatelet therapy (DAPT) has shown superior safety and efficacy outcomes compared with bare-metal stents among patients with high-bleeding risk (HBR) treated with 1-month DAPT. The safety and efficacy of the newer-generation durable-polymer DES Resolute Onyx compared with polymer-free DES among HBR patients treated with 1-month DAPT is unknown.

Trial Design: The Onyx ONE global randomized trial is an international, prospective, randomized, blinded, controlled study enrolling HBR patients undergoing percutaneous coronary intervention. The trial will randomize up to 2,000 patients in a 1:1 fashion to receive either the durable-polymer Resolute Onyx DES or the polymer-free Biosensors BioFreedom DES. After index procedure, patients in both arms will be treated with 1 month of DAPT (aspirin and oral P2Y12 inhibitor), followed by single antiplatelet therapy thereafter. The primary end point is the composite end point of cardiac death, myocardial infarction, or stent thrombosis at 1-year follow-up. The powered secondary end point is target lesion failure (defined as the composite of cardiac death, target vessel myocardial infarction, or clinically driven target lesion revascularization) at 1 year. Patient follow-up is planned for 1, 2, and 6 months and 1 and 2 years after the procedure.

Conclusions: The Onyx ONE global randomized trial is the first study to directly compare the safety and efficacy of a durable polymer DES (Resolute Onyx) with a polymer-free DES (BioFreedom) in HBR patients treated with 1 month of DAPT.
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http://dx.doi.org/10.1016/j.ahj.2019.04.017DOI Listing
August 2019

Clinical and Angiographic Outcomes With a Novel Radiopaque Sirolimus-Eluting Bioresorbable Vascular Scaffold.

Circ Cardiovasc Interv 2019 06 10;12(6):e007283. Epub 2019 Jun 10.

Columbia University Medical Center / New York-Presbyterian Hospital (G.W.S.).

Background A novel bioresorbable scaffold, the sirolimus-eluting Fantom, incorporates a radiopaque polymer, struts with a thickness of 125 µm, and a crossing profile of 1.35 mm. The purpose of this study was to evaluate the 9-month angiographic and 12-month clinical outcomes of the FANTOM scaffold in a larger patient population. Methods and Results The FANTOM II study (Safety & Performance Study of the Fantom Sirolimus-Eluting Bioresorbable Coronary Scaffold - First Report on Initial 24 Month Outcomes) was a prospective, multicenter trial which enrolled 240 patients with single de novo coronary stenosis with reference vessel diameter 2.5 to 3.5 mm diameter and lesion length ≤20 mm. Major adverse cardiac events through 12-month follow-up were assessed. Angiographic follow-up was performed in consecutive patient cohorts at 6 months (n=117) and 9 months (n=123). Acute delivery success, acute technical success, acute procedural success, and clinical procedural success rates as defined in the clinical protocol were 97.9% (235/240), 95.8% (230/240), 99.1% (228/230), and 99.6% (227/228), respectively. The mean in-stent late lumen loss at 6 months and 9 months were 0.25±0.40 mm and 0.33±0.36 mm, respectively, and in-segment binary restenosis occurred in 2.0% and 7.6% of patients, respectively. Major adverse cardiac events and target lesion failure through 12 months occurred in 4.2% of 240 patients; scaffold thrombosis developed in only one patient (0.4%). Conclusions The Fantom sirolimus-eluting bioresorbable coronary scaffold demonstrated favorable safety and effectiveness performance at 12-month follow-up. Longer-term follow-up is ongoing to examine the late outcomes with this novel device. Clinical Trial Registration URL: https://www.clinicaltrials.gov . Unique identifier: NCT02539966.
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http://dx.doi.org/10.1161/CIRCINTERVENTIONS.118.007283DOI Listing
June 2019

Three-year clinical and two-year multimodality imaging outcomes of a thin-strut sirolimus-eluting bioresorbable vascular scaffold: MeRes-1 trial.

EuroIntervention 2019 Sep;15(7):607-614

Fortis Escorts Heart Institute, New Delhi, India.

Aims: Although the proof of concept of the bioresorbable vascular scaffold (BRS) is well documented, device-related adverse outcomes with first-generation BRS indicate longer-term surveillance. The current study provides insights into the safety and performance of the MeRes100, a novel second-generation sirolimus-eluting BRS, beyond one-year up to three-year follow-up (FU).

Methods And Results: A total of 108 enrolled patients with de novo coronary artery lesions who underwent implantation of MeRes100 as part of the first-in-human MeRes-1 trial were followed up clinically beyond one year at two and three years and with multiple modality imaging at six months and two years. At three-year FU, the cumulative major adverse cardiac events rate was 1.87%, in the form of two ischaemia-driven target lesion revascularisations. No scaffold thrombosis was reported. Between six months and two years at quantitative coronary angiography, in-segment late lumen loss (LLL) (0.15±0.22 mm vs. 0.23±0.32 mm; p=0.18) and in-scaffold LLL (0.13±0.22 mm vs. 0.24±0.34 mm; p=0.10) changed insignificantly. IVUS subset analysis revealed a non-significant reduction in mean lumen area (6.17±1.28 mm2 vs. 5.47±1.50 mm2; p=0.21) and minimum lumen area (5.14±1.19 mm2 vs. 4.05±1.42 mm2; p=0.10) at two years compared to post-procedural measurements. OCT subset analysis demonstrated 99.24±2.27% neointimal strut coverage.

Conclusions: The extended outcomes of the MeRes-1 trial demonstrated sustained efficacy and safety of the MeRes100 BRS with maintained lumen patency up to two years by multimodality imaging and no very late scaffold thrombosis up to three-year clinical FU.The MeRes-1 trial is registered at the Clinical Trials Registry-India. CTRI Number: CTRI/2015/04/005706.
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http://dx.doi.org/10.4244/EIJ-D-19-00324DOI Listing
September 2019

First Report of Edge Vascular Response at 12 Months of Magmaris, A Second-Generation Drug-Eluting Resorbable Magnesium Scaffold, Assessed by Grayscale Intravascular Ultrasound, Virtual Histology, and Optical Coherence Tomography. A Biosolve-II Trial Sub-Study.

Cardiovasc Revasc Med 2019 05 18;20(5):392-398. Epub 2019 Feb 18.

Interventional Cardiology Department, MedStar Washington Hospital Center, Washington, DC, USA.

Introduction And Objective: The edge vascular response (EVR) remains unknown in second generation drug-eluting Resorbable Magnesium Scaffold (RMS), such as Magmaris. The aim of the study was to evaluate tissue modifications in the RMS edges over time, assessed by different invasive imaging modalities.

Methods: The patients treated with the device were assessed by optical coherence tomography (OCT), grayscale intravascular ultrasound (IVUS), and virtual histology IVUS at baseline and 12 months. The EVR study performed a segment- and frame-level analysis of the 5 mm segments proximal and distal of the actual RMS.

Results: The segment-level grayscale IVUS (n = 10), virtual histology IVUS (n = 10), and OCT (n = 18) analysis did not show any significant changes after 12 months, except for a fibrous plaque area (FPA) reduction of 0.5mm (p = 0.017) in the proximal segment compared to baseline. In the frame-level analysis, IVUS evaluation revealed a vessel area decreased 2.80 ± 1.43 mm (p = 0.012) and 2.49 ± 1.53 mm (p = 0.022) in 2 proximal frames. This was accompanied by plaque area reduction of 0.88 ± 0.70 mm (p = 0.048) and a FPA decreased by 0.63 ± 0.48 mm (p = 0.004) in one proximal frame. In 1 distal frame, there was a dense calcium area reduction of 0.10 ± 0.12 mm (p = 0.045), FPA and fibrous fatty plaque increased 0.54 ± 0.53 mm (p = 0.023) and 0.17 ± 0.16 mm (p = 0.016), respectively. By OCT, there was a lumen area decrease of 0.76 ± 1.51 mm (p = 0.045) in a distal frame.

Conclusion: At 12 months, Magmaris EVR assessment does not show overall significant changes, except for a fibrous plaque area reduction in the proximal segment. This could be translated as a benign healing process at the edges of the RMS.

Summary: The edge vascular response (EVR) remains unknown in second generation drug-eluting absorbable metal scaffolds (RMS), such as Magmaris. Patients treated with the device were assessed by multi invasive imaging modalities [i.e. optical coherence tomography (OCT), grayscale intravascular ultrasound (IVUS), and virtual histology IVUS] evaluating the tissue changes over time in the segment- and frame-level analysis of the 5 mm segments proximal and distal of the actual RMS. As a result, after 12 months, Magmaris EVR assessment does not show overall significant changes, except for a fibrous plaque area reduction in the proximal segment, translating a benign healing process at the edges of the RMS.
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http://dx.doi.org/10.1016/j.carrev.2019.02.019DOI Listing
May 2019

Mechanical performance and healing patterns of the novel sirolimus-eluting bioresorbable Fantom scaffold: 6-month and 9-month follow-up by optical coherence tomography in the FANTOM II study.

Open Heart 2019;6(1):e000941. Epub 2019 Feb 28.

Department of Cardiology, Aarhus University Hospital, Skejby, Aarhus, Denmark.

Objectives: We aimed to evaluate the mechanical properties and healing patterns 6 and 9 months after implantation of the sirolimus-eluting Fantom bioresorbable scaffold (BRS).

Background: The Fantom BRS (Reva Medical, San Diego, USA) has differentiating properties including radiopacity, strut thickness of 125 µm, high expansion capacity and has demonstrated favourable mid-term clinical and angiographic outcomes.

Methods And Results: FANTOM II was a prospective, single arm study with implantation of the Fantom BRS in 240 patients with stable angina pectoris. Guidance by optical coherence tomography (OCT) was encouraged and was repeated at 6-month (cohort A) or 9-month follow-up (cohort B). Matched baseline and follow-up OCT recordings were available in 152 patients. In-scaffold mean lumen area in cohort A was 6.8±1.7 mm and 5.7±1.4 mm at baseline and follow-up (p<0.0001) and was 7.2±1.6 mm and 5.6±1.4 mm in cohort B (p<0.0001). Mean scaffold area remained stable from 7.1±1.5 mm at baseline to 7.2±1.4 mm at 6 months (p=0.12), and from 7.4±1.5 mm to 7.3±1.4 mm at 9 months. Strut malapposition was median 0.8 (IQR 0.0;3.5)% and 1.8 (IQR 0.3;6.0)% at baseline and was 0.0 (IQR 0.0;0.0)% in both groups at 6-month and 9-month follow-up. Strut tissue coverage was 98.1 (IQR 95.9;99.4)% at 6 months and 98.9 (IQR 98.3;100.0)% at 9 months.

Conclusions: The novel Fantom BRS had favourable healing patterns at 6-month and 9-month follow-up as malapposition was effectively resolved and strut coverage was almost complete. The scaffold remained stable through follow-up with no signs of systematic late recoil.
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http://dx.doi.org/10.1136/openhrt-2018-000941DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6443130PMC
February 2021