Publications by authors named "Yangbo Xi"

2 Publications

  • Page 1 of 1

Long-Term Arterial Remodeling After Bioresorbable Scaffold Implantation 4-Year Follow-up of Quantitative Coronary Angiography, Histology and Optical Coherence Tomography.

Cardiovasc Eng Technol 2020 12 27;11(6):636-645. Epub 2020 Oct 27.

Department of Cardiology, The Dongguan Affiliated Hospital of Jinan University, Binhaiwan Central Hospital of Dongguan, Dongguan, China.

Purpose: Our previous studies have confirmed the safety and efficacy of the novel fully bioresorbable PLLA scaffold (PowerScaffold®) at 12 months implantation. In the present study, the scaffold absorption and coronary vessel remodeling at 4 years were evaluated.

Methods: After PowerScaffold® were implanted into 13 coronary arteries of 6 miniature pigs, quantitative coronary angiography (QCA) was performed at 15 days and 4 years follow-up to measure the mean lumen diameter (MLD), late lumen loss (LLL), and % stenosis of the coronary arteries. Optical coherence tomography (OCT) was performed to obtain the strut footprints at 4 years before euthanization for histological analysis. In addition, 2 PowerScaffold® were implanted into 2 miniature pigs for 2 years as supplementary data. All stented arteries were dissected and stained with HE, Masson, EVG, and Alcian blue to observe struts, cells, fibrinoid, elastin, and proteoglycans, respectively.

Results: There were no significant differences in MLD, LLL and % stenosis in stented coronary arteries between 15 days and 4 years by QCA. At 4 years, most strut sites were indiscernible and replaced by extracellular matrix and connective tissue by histology. Both strut/vessel wall interaction and strut coverage were shown 100% by OCT.

Conclusion: At 4 years, the scaffold struts were completely embedded into vessel wall and mostly replaced by regenerated tissue. There was no sign of in-stent stenosis in all stented arteries.
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December 2020

Long-term clinical safety and efficacy of drug-coated balloon in the treatment of in-stent restenosis: A meta-analysis and systematic review.

Catheter Cardiovasc Interv 2020 08 12;96(2):E129-E141. Epub 2019 Nov 12.

Department of Cardiology, The Dongguan Affiliated Hospital (Dongguan 5th People's Hospital), Jinan University School of Medicine, Dongguan, China.

Objectives: The aim of this study was to evaluate the long-term clinical safety and efficacy of drug-coated balloon (DCB) in the treatment of in-stent restenosis (ISR).

Background: There is a long-term safety issue in peripheral arterial disease patients treated with paclitaxel-coated balloon, this has also raised concerns on DCB in coronary intervention.

Methods: Nine randomized controlled trials (RCTs) and nine observational studies (OSs) were included with a total of 3,782 patients (1,827 in the DCB group, 1,955 in the drug-eluting stent [DES] group) being analyzed. The primary outcome measure-major adverse cardiovascular events (MACEs), target lesion revascularization (TLR), target vessel revascularization (TVR), myocardial infarction (MI), cardiac death (CD), stent thrombosis (ST), all-cause death (AD), and coronary angiography outcomes included late lumen loss (LLL), minimum luminal diameter (MLD), diameter stenosis (DS) were analyzed.

Results: DCB treatment significantly reduced the LLL (MD: -0.13; [CI -0.23 to -0.03], p = .01). No difference was found for MLD (MD: -0.1; [CI -0.24 to 0.04], p = .17) and DS% (RR = 0.98 [CI 0.80-1.20], p = .86). There was no significant difference in TLR, TVR, MI, CD, ST, AD, and the overall incidence of MACEs between the two groups up to 3 years follow-up. Subgroup analysis for different type of ISR and DES showed no significant difference in the incidence of endpoints, and there is no difference when considering RCTs or OSs only.

Conclusions: The safety and efficacy of the DCB and DES in the treatment of ISR is comparable at up to 3 years follow-up.
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August 2020