Publications by authors named "Payam Akhyari"

160 Publications

Impact of pretransplant left ventricular assist device support duration on outcome after heart transplantation.

Interact Cardiovasc Thorac Surg 2021 Oct 14. Epub 2021 Oct 14.

Department of Cardiac Surgery, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany.

Objectives: Heart transplantation after left ventricular assist device (LVAD) implantation remains challenging. It is still unclear whether its support duration impacts the outcome after transplantation.

Methods: All patients undergoing heart transplantation between 2010 and 2021 at a single department after previous left ventricular assistance were retrospectively reviewed and divided into 4 different study groups with regard to the duration of LVAD support to examine the impact on the postoperative morbidity and mortality.

Results: A total of n = 198 patients were included and assigned to the 4 study groups (group 1: <90 days, n = 14; group 2: 90 days to 1 year, n = 31; group 3: 1-2 years, n = 29; group 4: >2 years, n = 24). Although there were no differences between the 4 groups concerning relevant mismatch between the recipients and donors, the incidence of primary graft dysfunction was numerically increased in patients with the shortest support duration, and also those patients with >1 year of support (group 1: 35.7%, group 2: 25.8%, group 3: 41.4%, group 4: 37.5%, P = 0.63). The incidence of acute graft rejection was by trend increased in patients of group 1 (group 1: 28.6%, group 2: 3.3%, group 3: 7.1%, group 4: 12.5%, P = 0.06). Duration of LVAD support did not impact on perioperative adverse events (infections, P = 0.79; acute kidney injury, P = 0.85; neurological events, P = 0.74; thoracic bleeding, P = 0.61), neither on postoperative survival (1-year survival: group 1: 78.6%, group 2: 66.7%, group 3: 80.0%, group 4: 72.7%, P = 0.74).

Conclusion: We cannot identify a significant impact of the duration of pretransplant LVAD support on postoperative outcome; therefore, we cannot recommend a certain timeframe for transplantation of LVAD patients.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1093/icvts/ivab265DOI Listing
October 2021

Adequate immune response after SARS-CoV-2 infection and single dose vaccination despite rapid heart transplantation.

ESC Heart Fail 2021 Oct 4. Epub 2021 Oct 4.

Department of Cardiac Surgery, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Moorenstrasse 5, Duesseldorf, 40225, Germany.

Adequate immune response to vaccination remains a challenge in patients after solid organ transplantation. We report a case of a 61-year-old male patient who received a left ventricular assist device as a bridge to transplant therapy. Three months before transplantation, he suffered mild SARS-CoV-2 infection and was successfully discharged thereafter. Eight days before his successful heart transplantation, he received mRNA BNT 162b2 vaccination. Immediately after transplantation, we detected sufficient rise of nucleocapsid and spike antibodies despite immune suppression therapy. We suspect potential booster effects of the previous SARS-CoV-2 infection giving rise to adequate immune response following single vaccination.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1002/ehf2.13635DOI Listing
October 2021

Risk Factors for Acute Kidney Injury Requiring Renal Replacement Therapy after Orthotopic Heart Transplantation in Patients with Preserved Renal Function.

J Clin Med 2021 Sep 12;10(18). Epub 2021 Sep 12.

Department of Cardiac Surgery, Medical Faculty and University Hospital Duesseldorf, Heinrich-Heine-University Duesseldorf, 40225 Duesseldorf, Germany.

Acute kidney injury (AKI), requiring renal replacement therapy (RRT). is a serious complication after orthotopic heart transplantation (HTX). In patients with preexisting impaired renal function, postoperative AKI is unsurprising. However, even in patients with preserved renal function, AKI requiring RRT is frequent. Therefore, this study aimed to identify risk factors associated with postoperative AKI requiring RRT after HTX in this sub-cohort. This retrospective cohort study included patients ≥ 18 years of age with preserved renal function (defined as preoperative glomerular filtration rate ≥ 60 mL/min) who underwent HTX between 2010 and 2021. In total, 107 patients were included in the analysis (mean age 52 ± 12 years, 78.5% male, 45.8% AKI requiring RRT). Based on univariate logistic regression, use of extracorporeal membrane oxygenation, postoperative infection, levosimendan therapy, duration of norepinephrine (NE) therapy and maximum daily increase in tacrolimus plasma levels were chosen to be included into multivariate analysis. Duration of NE therapy and maximum daily increase in tacrolimus plasma levels remained as independent significant risk factors (NE: OR 1.01, 95%CI: 1.00-1.02, = 0.005; increase in tacrolimus plasma level: OR 1.18, 95%CI: 1.01-1.37, = 0.036). In conclusion, this study identified long NE therapy and maximum daily increase in tacrolimus plasma levels as risk factors for AKI requiring RRT in HTX patients with preserved renal function.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.3390/jcm10184117DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8470552PMC
September 2021

Erratum to: Successful Heart Transplantation after Cardiopulmonary Resuscitation of Donors.

Thorac Cardiovasc Surg 2021 Sep 20;69(6):e1-e2. Epub 2021 Sep 20.

Department of Cardiac Surgery, University Hospital Duesseldorf, Duesseldorf, Germany.

View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1055/s-0040-1716567DOI Listing
September 2021

Cytomegalovirus mismatch after heart transplantation: Impact of antiviral prophylaxis and intravenous hyperimmune globulin.

Immun Inflamm Dis 2021 Sep 15. Epub 2021 Sep 15.

Department of Cardiac Surgery, Heinrich Heine University Düsseldorf, Düsseldorf, Germany.

Objective: Cytomegalovirus (CMV) infections are correlated with complications following heart transplantation (HTx) and impaired outcome. The impact of a serologic mismatch between donor and recipient and the necessity of prophylactic virostatic medication is still a matter of concern.

Methods: We retrospectively reviewed all patients that underwent HTx between 2010 and 2020 in our department. The recipients (n = 176) could be categorized into four risk groups depending on their serologic CMV matching (D /R  = donor CMV-IgG positive and recipient CMV-IgG negative, n = 32; D /R , n = 51; D /R , n = 35; D /R , n = 58). All patients followed the same protocol of CMV prophylaxis with application of ganciclovir/valganciclovir and intravenous CMV hyperimmune globulin.

Results: Incidence of postoperative morbidity such as primary graft dysfunction, neurological events, infections, and graft rejection were comparable between all groups (p > .05). However, the incidence of postoperative acute kidney injury with hemodialysis was by trend increased in the D /R group (72.0%) compared to the other groups. In-hospital CMV-DNAemia was observed in serologic positive recipients only (D /R : 0.0%, D /R : 25.0%, D /R : 0.0%, D /R : 13.3%, p < .01). During the first year, a total of 18 patients developed CMV-DNAemia (D /R : 31.6%, D /R : 31.9%, D /R : 3.4%, D /R : 11.1%, p = .03).

Conclusions: Seropositive recipients carry an important risk for CMV-DNAemia. However, we did not observe differences in perioperative morbidity and mortality regarding CMV matching, which might be related to regularly administer prophylactic virostatics and additional CMV-IVIG for risk constellations. For high-risk constellation, long-term application of CMV-IVIG during the first year after transplant may be beneficial.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1002/iid3.508DOI Listing
September 2021

Human myocardial mitochondrial oxidative capacity is impaired in mild acute heart transplant rejection.

ESC Heart Fail 2021 Sep 6. Epub 2021 Sep 6.

Division of Cardiology, Pulmonology and Vascular Medicine, Medical Faculty, Heinrich-Heine University, Moorenstraße 5, Düsseldorf, 40225, Germany.

Aims: Acute cellular rejection (ACR) following heart transplantation (HTX) is associated with long-term graft loss and increased mortality. Disturbed mitochondrial bioenergetics have been identified as pathophysiological drivers in heart failure, but their role in ACR remains unclear. We aimed to prove functional disturbances of myocardial bioenergetics in human heart transplant recipients with mild ACR by assessing myocardial mitochondrial respiration using high-resolution respirometry, digital image analysis of myocardial inflammatory cell infiltration, and clinical assessment of HTX patients. We hypothesized that (i) mild ACR is associated with impaired myocardial mitochondrial respiration and (ii) myocardial inflammation, systemic oxidative stress, and myocardial oedema relate to impaired mitochondrial respiration and myocardial dysfunction.

Methods And Results: We classified 35 HTX recipients undergoing endomyocardial biopsy according International Society for Heart and Lung Transplantation criteria to have no (0R) or mild (1R) ACR. Additionally, we quantified immune cell infiltration by immunohistochemistry and digital image analysis. We analysed mitochondrial substrate utilization in myocardial fibres by high-resolution respirometry and performed cardiovascular magnetic resonance (CMR). ACR (1R) was diagnosed in 12 patients (34%), while the remaining 23 patients revealed no signs of ACR (0R). Underlying cardiomyopathies (dilated cardiomyopathy 50% vs. 65%; P = 0.77), comorbidities (type 2 diabetes mellitus: 50% vs. 35%, P = 0.57; chronic kidney disease stage 5: 8% vs. 9%, P > 0.99; arterial hypertension: 59% vs. 30%, P = 0.35), medications (tacrolimus: 100% vs. 91%, P = 0.54; mycophenolate mofetil: 92% vs. 91%, P > 0.99; prednisolone: 92% vs. 96%, P > 0.99) and time post-transplantation (21.5 ± 26.0 months vs. 29.4 ± 26.4 months, P = 0.40) were similar between groups. Mitochondrial respiration was reduced by 40% in ACR (1R) compared with ACR (0R) (77.8 ± 23.0 vs. 128.0 ± 33.0; P < 0.0001). Quantitative assessment of myocardial CD3 -lymphocyte infiltration identified ACR (1R) with a cut-off of >14 CD3 -lymphocytes/mm (100% sensitivity, 82% specificity; P < 0.0001). Myocardial CD3 infiltration (r = -0.41, P < 0.05), systemic oxidative stress (thiobarbituric acid reactive substances; r = -0.42, P < 0.01) and myocardial oedema depicted by global CMR derived T2 time (r = -0.62, P < 0.01) correlated with lower oxidative capacity and overt cardiac dysfunction (global longitudinal strain; r = -0.63, P < 0.01).

Conclusions: Mild ACR with inflammatory cell infiltration associates with impaired mitochondrial bioenergetics in cardiomyocytes. Our findings may help to identify novel checkpoints in cardiac immune metabolism as potential therapeutic targets in post-transplant care.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1002/ehf2.13607DOI Listing
September 2021

The quality of afterlife: surviving extracorporeal life support after therapy-refractory circulatory failure-a comprehensive follow-up analysis.

ESC Heart Fail 2021 Sep 4. Epub 2021 Sep 4.

Department of Cardiac Surgery, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Moorenstr. 5, Düsseldorf, 40225, Germany.

Aims: Extracorporeal life support (ECLS) represents a popular treatment option for therapy-refractory circulatory failure and substantially increases survival. However, comprehensive follow-up (FU) data beyond short-term survival are mostly lacking. Here, we analyse functional recovery and quality of life of longer-term survivors.

Methods And Results: Between 2011 and 2016, a total of n = 246 consecutive patients were treated with ECLS for therapy-refractory circulatory failure in our centre. Out of those, 99 patients (40.2%) survived the first 30 days and were retrospectively analysed. Fifty-eight patients (23.6%) were still alive after a mean FU of 32.4 ± 16.8 months. All surviving patients were invited to a prospective, comprehensive clinical FU assessment, which was completed by 39 patients (67.2% of survivors). Despite high incidence of early functional impairments, FU assessment revealed a high degree of organ and functional recovery with more than 70% of patients presenting with New York Heart Association class ≤ II, 100% free of haemodialysis, 100% free of moderate or severe neurological disability, 71.8% free of moderate or severe depression, and 84.4% of patients reporting to be caring for themselves without need for assistance.

Conclusions: Patients surviving the first 30 days of ECLS therapy for circulatory failure without severe adverse events have a quite favourable outcome in terms of subsequent survival as well as functional recovery, showing the potential of ECLS therapy for patients to recover. Patients can recover even after long periods of mechanically support and regain physical and mental health to participate in their former daily life and work.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1002/ehf2.13554DOI Listing
September 2021

Initial experience covering 50 consecutive cases of large Impella implantation at a single heart centre.

ESC Heart Fail 2021 Sep 4. Epub 2021 Sep 4.

Department of Cardiac Surgery and Research Group for Experimental Surgery, Medical Faculty and University Hospital Düsseldorf, Heinrich Heine University Hospital, Moorenstr. 5, Düsseldorf, 40225, Germany.

Aims: Pre-operative or post-operative heart failure (HF) and cardiogenic shock of various natures frequently remain refractory to conservative treatment and require mechanical circulatory support. We report our clinical experience with large Impella systems (5.0 or 5.5; i.e. Impella 5+) (Abiomed Inc., Boston, USA) and evaluate the parameters that determined patient outcome.

Methods And Results: The initial 50 cases of Impella 5+ implanted for acute HF between November 2018 and August 2020 at a single centre were enrolled in this study. Data, including preoperative characteristics, perioperative clinical course information, and post-operative outcomes, were retrospectively collected from the hospital data management and quality assurance system. Descriptive and univariate analyses were performed. Among the 49 patients in this study, 28 (56.0%) survived in the first 30 days post-operatively, and 3 died of non-cardiac reasons later. In-hospital mortality was significantly higher in patients with biventricular failure [P < 0.01, odds ratio (OR) 5.63] or dilated cardiomyopathy (DCM) (P = 0.02, OR 15.8), whereas ischaemic cardiomyopathy (ICM) was associated with lower mortality (P = 0.03, OR 0.24). Interestingly, the mortality was comparable between the 'solo' Impella group and the veno-arterial extracorporal membrane oxygenation (va-ECMO) plus Impella (ECMELLA) group, despite the severity of the patients' profile in the ECMELLA group ('solo' vs. ECMELLA; 55.6% vs. 52.6%, P = 1.00). All patients who received an additional temporary right ventricular assist device (tRVAD) were successfully weaned from va-ECMO.

Conclusions: Our results suggest that biventricular failure and DCM are predictors of higher mortality in patients with Impella. Considering the pathophysiology of HF, implantation of a large Impella system seems to be promising, especially for ICM patients. The large Impella system might be more effective for better prognosis of patients under va-ECMO, and combination therapy with tRVAD seems to be a promising strategy for early weaning from va-ECMO.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1002/ehf2.13594DOI Listing
September 2021

Postcardiotomy Veno-Arterial Extracorporeal Membrane Oxygenation: Does the Cannulation Technique Influence the Outcome?

Front Cardiovasc Med 2021 9;8:658412. Epub 2021 Aug 9.

University Department for Cardiac Surgery, Leipzig Heart Center, Leipzig, Germany.

Veno-arterial extracorporeal membrane oxygenation (VA-ECMO) may be cannulated using either central (cannulation of aorta) or peripheral (cannulation of femoral or axillary artery) access. The ideal cannulation approach for postcardiotomy cardiogenic shock (PCS) is still unknown. The aim of this study is to compare the outcome of patients with PCS who were supported with central vs. peripheral cannulation. This is a single-center retrospective data analysis including all VA-ECMO implantations for PCS from January 2011 to December 2017. The central and peripheral approaches were compared in terms of patient characteristics, intensive care unit (ICU) stay, hospitalization length, adverse event rates, and overall survival. Eighty-six patients met the inclusion criteria. Twenty-eight patients (33%) were cannulated using the central approach, and 58 patients (67%) were cannulated using the peripheral approach. Forty-three patients (50%) received VA-ECMO in the operating room and 43 patients (50%) received VA-ECMO in the ICU. Central VA-ECMO group had higher EuroSCORE II ( = 0.007), longer cross-clamp time ( = 0.054), higher rate of open chest after the procedure ( < 0.001), and higher mortality rate ( = 0.02). After propensity score matching, 20 patients in each group were reanalyzed. In the matched groups, no statistically significant differences were observed in the baseline characteristics between the two groups except for a higher rate of open chests in the central ECMO group ( = 0.02). However, no significant differences were observed in the outcome and complications between the groups. This study showed that in postcardiotomy patients requiring VA-ECMO support, similar complication rates and outcome were observed regardless of the cannulation strategy.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.3389/fcvm.2021.658412DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8382236PMC
August 2021

Outcome of patients with non-ischaemic cardiogenic shock supported by percutaneous left ventricular assist device.

ESC Heart Fail 2021 Oct 23;8(5):3594-3602. Epub 2021 Aug 23.

Division of Cardiology, Pulmonology, and Vascular Medicine, Medical Faculty, Heinrich-Heine University, Düsseldorf, Germany.

Aims: Percutaneous left ventricular assist devices (pVADs) are used to haemodynamically stabilize patients with cardiogenic shock (CS) caused by acute myocardial infarction (AMI). One out of every two patients has a non-ischaemic cause of CS, and these patients differ profoundly from patients with AMI-related CS. We assessed the usefulness of pVAD support for patients with non-ischaemic CS.

Methods And Results: We analysed 106 patients with CS and Impella® support between 2015 and 2018. CS was non-ischaemic in 36 patients and AMI-related in 70 patients. Compared with the AMI group, those in the non-ischaemic group were significantly younger [median age 62 (50.8, 70.8) years vs. 68 (58.0, 75.5) years, P = 0.007] and had more patients with severely reduced left ventricular function (94% vs. 79%, P = 0.035) and worse glomerular filtration rate [45 (27, 57) mL/min vs. 60 (44, 78) mL/min]. Propensity score matching yielded 31 patients with non-ischaemic CS and 31 patients with AMI-related CS, without a difference in baseline laboratory values or comorbidities. In both groups, pVAD support was performed along with haemodynamic stabilization, reduction of catecholamines and normalization of lactate levels. In 7 days, systolic blood pressure increased from 91 (80, 101) mmHg at baseline to 100 (100, 120) mmHg in the non-ischaemic CS group (P = 0.001) and 89 (80, 100) mmHg at baseline to 112 (100, 128) mmHg in the AMI-related CS group (P = 0.001). Moreover, in 7 days, the need of catecholamines (calculated as vasoactive-inotropic score) decreased from 32.0 (11.1, 47.0) at baseline to 5.3 (0, 16.1) in the non-ischaemic group (P = 0.001) and from 35.2 (18.11, 67.0) to zero (0, 0) in the AMI-related CS group (P = 0.001). Lactate level decreased from 3.8 (2.8, 5.9) mmol/L at baseline to 1.0 (0.8, 2.1) mmol/L (P = 0.001) in the non-ischaemic CS group and from 3.8 (2.6, 6.5) mmol/L to 1.2 (1.0, 2.0) mmol/L in the AMI-related group (P = 0.001). In the non-ischaemic CS group, eight patients (25.8%) were upgraded to veno-arterial extracorporeal membrane oxygenation (VA-ECMO) or long-term mechanical circulatory support. Two of these upgraded patients received heart transplantation. In the AMI group, eight patients (25.8%) were upgraded to VA-ECMO or long-term mechanical circulatory support. Ninety-day survival did not significantly differ between the groups (non-ischaemic CS group 48.4%, AMI-related CS group 45.2%, P = 0.799).

Conclusions: pVAD support is useful for haemodynamic stabilization of patients with non-ischaemic CS and is valuable as a bridge to patients' recovery or long-term left ventricular support and heart transplantation.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1002/ehf2.13546DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8497228PMC
October 2021

Fibrinogen-Albumin-Ratio is an independent predictor of thromboembolic complications in patients undergoing VA-ECMO.

Sci Rep 2021 08 17;11(1):16648. Epub 2021 Aug 17.

Department of Cardiac Surgery, Medical Faculty and University Hospital Duesseldorf, Heinrich-Heine-University Duesseldorf, Moorenstr. 5, 40225, Duesseldorf, Germany.

Veno-arterial extracorporeal membrane oxygenation (VA-ECMO) supports patients suffering from refractory cardiogenic shock. Thromboembolic complications (TeC) are common in VA-ECMO patients and are associated with increased morbidity and mortality. Valid markers to predict TeC in VA-ECMO patients are lacking. The present study investigated the predictive value of baseline Fibrinogen-Albumin-Ratio (FAR) for in-hospital TeC in patients undergoing VA-ECMO. This retrospective cohort study included patients who underwent VA-ECMO therapy due to cardiogenic shock at the University Hospital Duesseldorf, Germany between 2011 and 2018. Main exposure was baseline FAR measured at initiation of VA-ECMO therapy. The primary endpoint was the in-hospital incidence of TeC. In total, 344 patients were included into analysis (74.7% male, mean age 59 ± 14 years). The in-hospital incidence of TeC was 34%. Receiver operating characteristics (ROC) curve of FAR for in-hospital TeC revealed an area under the curve of 0.67 [95% confidence interval (CI) 0.61-0.74]. Youden index determined a cutoff of 130 for baseline FAR. Multivariate logistic regression revealed an adjusted odds-ratio of 3.72 [95% CI 2.26-6.14] for the association between FAR and TeC. Baseline FAR is independently associated with in-hospital TeC in patients undergoing VA-ECMO. Thus, FAR might contribute to the prediction of TeC in this cohort.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1038/s41598-021-95689-xDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8371004PMC
August 2021

Atrial Thrombosis Caused by a Dislocated Left Atrial Appendage Closure Device After Mitral Valve Replacement.

JACC Case Rep 2020 Dec 12;2(15):2327-2330. Epub 2020 Aug 12.

Department of Cardiac Surgery, Medical School, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany.

A patient with a left atrial appendage occlusion device underwent mitral valve replacement. Later, the patient developed a left atrial thrombosis with thromboembolic myocardial infarction caused by a dislocation of the occlusion device. Exclusion of the device and non-device-based appendage occlusion may have prevented the patient from experiencing postoperative complications ().
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.jaccas.2020.05.096DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8304549PMC
December 2020

Dichloroacetate inhibits the degeneration of decellularized cardiovascular implants.

Eur J Cardiothorac Surg 2021 Jul 23. Epub 2021 Jul 23.

Department of Cardiovascular Surgery and Research Group for Experimental Surgery, Heinrich Heine University, Medical Faculty, Duesseldorf, Germany.

Objectives: Intima hyperplasia is a major issue of biological cardiovascular grafts resulting in progressive in vivo degeneration that particularly decreases the durability of coronary and peripheral vascular bypasses. Previously, dichloroacetate (DCA) has been reported to prevent the formation of hyperplastic intima in injured arteries. In this study, the effect of DCA on the neointima formation and degeneration of decellularized small-caliber implants was investigated in a rat model.

Methods: Donor rat aortic grafts (n = 22) were decellularized by a detergent-based technique, surface-coated with fibronectin (50 µl ml-1, 24 h incubation) and implanted via anastomoses to the infrarenal aorta of the recipients. Rats in the DCA group (n = 12) received DCA via drinking water during the whole follow-up period (0.75 g l-1), while rats without DCA treatment served as controls (n = 10). At 2 (n = 6 + 5) and 8 (n = 6 + 5) weeks, the grafts were explanted and examined by histology and immunofluorescence.

Results: Systemic DCA treatment inhibited neointima hyperplasia, resulting in a significantly reduced intima-to-media ratio (median 0.78 [interquartile range, 0.51-1.27] vs 1.49 [0.67-2.39] without DCA, P < 0.001). At 8 weeks, neointima calcification, as assessed by an established von Kossa staining-based score, was significantly decreased in the DCA group (0 [0-0.25] vs 0.63 [0.06-1.44] without DCA, P < 0.001). At 8 weeks, explanted grafts in both groups were luminally completely covered by an endothelial cell layer. In both groups, inflammatory cell markers (CD3, CD68) proved negative.

Conclusions: Systemic DCA treatment reduces adverse neointima hyperplasia in decellularized small-caliber arterial grafts, while allowing for rapid re-endothelialization. Furthermore, DCA inhibits calcification of the implants.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1093/ejcts/ezab333DOI Listing
July 2021

Crosstalk of Diabetic Conditions with Static Versus Dynamic Flow Environment-Impact on Aortic Valve Remodeling.

Int J Mol Sci 2021 Jun 28;22(13). Epub 2021 Jun 28.

Department of Cardiac Surgery, Medical Faculty, University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Moorenstraße 5, 40225 Düsseldorf, Germany.

Type 2 diabetes mellitus (T2D) is one of the prominent risk factors for the development and progression of calcific aortic valve disease. Nevertheless, little is known about molecular mechanisms of how T2D affects aortic valve (AV) remodeling. In this study, the influence of hyperinsulinemia and hyperglycemia on degenerative processes in valvular tissue is analyzed in intact AV exposed to an either static or dynamic 3D environment, respectively. The complex native dynamic environment of AV is simulated using a software-governed bioreactor system with controlled pulsatile flow. Dynamic cultivation resulted in significantly stronger fibrosis in AV tissue compared to static cultivation, while hyperinsulinemia and hyperglycemia had no impact on fibrosis. The expression of key differentiation markers and proteoglycans were altered by diabetic conditions in an environment-dependent manner. Furthermore, hyperinsulinemia and hyperglycemia affect insulin-signaling pathways. Western blot analysis showed increased phosphorylation level of protein kinase B (AKT) after acute insulin stimulation, which was lost in AV under hyperinsulinemia, indicating acquired insulin resistance of the AV tissue in response to elevated insulin levels. These data underline a complex interplay of diabetic conditions on one hand and biomechanical 3D environment on the other hand that possesses an impact on AV tissue remodeling.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.3390/ijms22136976DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8268732PMC
June 2021

Role of Concomitant Coronary Artery Bypass Grafting in Valve Surgery for Infective Endocarditis.

J Clin Med 2021 Jun 28;10(13). Epub 2021 Jun 28.

Department of Cardiothoracic Surgery, Jena University Hospital-Friedrich Schiller University of Jena, 07747 Jena, Germany.

Background: It is current practice to perform concomitant coronary artery bypass grafting (CABG) in patients with infective endocarditis (IE) who have relevant coronary artery disease (CAD). However, CABG may add complexity to the operation. We aimed to investigate the impact of concomitant CABG on perioperative outcomes in patients undergoing surgery for IE.

Methods: We retrospectively used data of surgically treated IE patients between 1994 and 2018 in six German cardiac surgery centers. We performed inverse probability weighting (IPW), multivariable adjustment, chi-square analysis, and Kaplan-Meier survival estimates.

Results: CAD was reported in 1242/4917 (25%) patients. Among them, 527 received concomitant CABG. After adjustment for basal characteristics between CABG and no-CABG patients using IPW, concomitant CABG was associated with higher postoperative stroke (26% vs. 21%, = 0.003) and a trend towards higher postoperative hemodialysis (29% vs. 25%, = 0.052). Thirty-day mortality was similar in both groups (24% vs. 23%, = 0.370). Multivariate Cox regression analysis after IPW showed that CABG was not associated with better long-term survival (HR: 1.00, 95% CI: 0.82-1.23, = 0.998).

Conclusion: In endocarditis patients with CAD, adding CABG to valve surgery may be associated with a higher likelihood of postoperative stroke without adding long-term survival benefits. Therefore, in the absence of critical CAD, concomitant CABG may be omitted without impacting outcome. The results are limited due to a lack of data on the severity of CAD, and therefore there is a need for a randomized trial.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.3390/jcm10132867DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8267636PMC
June 2021

Coronary artery bypass grafting under sole Impella 5.0 support for patients with severely depressed left ventricular function.

J Artif Organs 2021 Jun 24. Epub 2021 Jun 24.

Department of Cardiac Surgery and Research Group for Experimental Surgery, University Hospital and Medical Faculty, Heinrich Heine University Hospital, Moorenstr. 5, 40225, Düsseldorf, Germany.

Selection of the ideal surgical procedure for coronary revascularization in patients with severe cardiac dysfunction at times may represent a challenge. In recent years, with the advent of surgical large microaxial pumps, e.g., Impella 5.0 (Abiomed Inc., Boston, USA), specific support and effective unloading of the left ventricle has become available. In the interventional field, good results have been achieved with smaller microaxial pumps in the setting of so-called protected percutaneous coronary intervention. In this study, we would like to share our early experience with surgical coronary revascularization under the sole support of Impella 5.0, omitting the use of heart-lung machine in three cases of severe cardiac dysfunction due to complex ischemic heart disease. Effective circulatory support intraoperatively and postoperatively speaks in favor of this technique in selected patients.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1007/s10047-021-01285-1DOI Listing
June 2021

Combined heart transplantation and replacement of atheromatous proximal arch.

Clin Case Rep 2021 May 19;9(5):e04073. Epub 2021 May 19.

Department of Cardiac Surgery Medical Faculty Heinrich Heine University Düsseldorf Germany.

Concomitant surgery on the aortic arch with hypothermic cardiac arrest in the setting of heart transplantation (HTX) is extremely rare. Herein, we report a case of combined HTX and proximal arch replacement at our institution.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1002/ccr3.4073DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8133076PMC
May 2021

Treatment of donor-specific antibody-mediated rejection after heart transplantation by IgM-enriched human immunoglobulin.

ESC Heart Fail 2021 Aug 10;8(4):3413-3417. Epub 2021 May 10.

Department of Cardiac Surgery, Medical Faculty, Heinrich-Heine-University Medical School, Moorenstraße 5, Duesseldorf, 40225, Germany.

Antibody-mediated graft rejection caused by donor-specific antibodies (DSA-MR) remains a serious problem after heart transplantation (HTx). IgM-enriched human intravenous immunoglobulin (IGM-IVIG) consists of 76% IgG, 12% IgM, and 12% IgA and provides a new multifactorial approach for DSA-MR. Between 2017 and 2020, four (P1-4) of 102 patients developed DSA-MR after HTx in our department and were repetitively treated with IGM-IVIG in combination with anti-thymocyte globulin. While in P1 and P4, DSA-MR occurred within the early post-operative interval, P2 and P3 developed DSA-MR approximately 1 year after transplantation. An impairment of ventricular function was observed in three of four patients. Furthermore, P1 and P4 suffered from malign ventricular arrhythmias. After the application of IGM-IVIG, the ventricular function recovered, and all patients could be discharged from the hospital. As part of a multifactorial therapeutic approach, treatment with IGM-IVIG seems to be a safe and effective strategy to address DSA-MR.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1002/ehf2.13409DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8318410PMC
August 2021

Reproducible In Vitro Tissue Culture Model to Study Basic Mechanisms of Calcific Aortic Valve Disease: Comparative Analysis to Valvular Interstitials Cells.

Biomedicines 2021 Apr 26;9(5). Epub 2021 Apr 26.

Department of Cardiac Surgery, Medical Faculty, University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, 40225 Düsseldorf, Germany.

The hallmarks of calcific aortic valve disease (CAVD), an active and regulated process involving the creation of calcium nodules, lipoprotein accumulation, and chronic inflammation, are the significant changes that occur in the composition, organization, and mechanical properties of the extracellular matrix (ECM) of the aortic valve (AV). Most research regarding CAVD is based on experiments using two-dimensional (2D) cell culture or artificially created three-dimensional (3D) environments of valvular interstitial cells (VICs). Because the valvular ECM has a powerful influence in regulating pathological events, we developed an in vitro AV tissue culture model, which is more closely able to mimic natural conditions to study cellular responses underlying CAVD. AV leaflets, isolated from the hearts of 6-8-month-old sheep, were fixed with needles on silicon rubber rings to achieve passive tension and treated in vitro under pro-degenerative and pro-calcifying conditions. The degeneration of AV leaflets progressed over time, commencing with the first visible calcified domains after 14 d and winding up with the distinct formation of calcium nodules, heightened stiffness, and clear disruption of the ECM after 56 d. Both the expression of pro-degenerative genes and the myofibroblastic differentiation of VICs were altered in AV leaflets compared to that in VIC cultures. In this study, we have established an easily applicable, reproducible, and cost-effective in vitro AV tissue culture model to study pathological mechanisms underlying CAVD. The valvular ECM and realistic VIC-VEC interactions mimic natural conditions more closely than VIC cultures or 3D environments. The application of various culture conditions enables the examination of different pathological mechanisms underlying CAVD and could lead to a better understanding of the molecular mechanisms that lead to VIC degeneration and AS. Our model provides a valuable tool to study the complex pathobiology of CAVD and can be used to identify potential therapeutic targets for slowing disease progression.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.3390/biomedicines9050474DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8146785PMC
April 2021

Degeneration of Aortic Valves in a Bioreactor System with Pulsatile Flow.

Biomedicines 2021 Apr 23;9(5). Epub 2021 Apr 23.

Department of Cardiac Surgery, Medical Faculty, University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Moorenstraße 5, 40225 Düsseldorf, Germany.

Calcific aortic valve disease is the most common valvular heart disease in industrialized countries. Pulsatile pressure, sheer and bending stress promote initiation and progression of aortic valve degeneration. The aim of this work is to establish an ex vivo model to study the therein involved processes. Ovine aortic roots bearing aortic valve leaflets were cultivated in an elaborated bioreactor system with pulsatile flow, physiological temperature, and controlled pressure and pH values. Standard and pro-degenerative treatment were studied regarding the impact on morphology, calcification, and gene expression. In particular, differentiation, matrix remodeling, and degeneration were also compared to a static cultivation model. Bioreactor cultivation led to shrinking and thickening of the valve leaflets compared to native leaflets while gross morphology and the presence of valvular interstitial cells were preserved. Degenerative conditions induced considerable leaflet calcification. In comparison to static cultivation, collagen gene expression was stable under bioreactor cultivation, whereas expression of hypoxia-related markers was increased. Osteopontin gene expression was differentially altered compared to protein expression, indicating an enhanced protein turnover. The present ex vivo model is an adequate and effective system to analyze aortic valve degeneration under controlled physiological conditions without the need of additional growth factors.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.3390/biomedicines9050462DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8145810PMC
April 2021

Levosimendan for Treatment of Primary Graft Dysfunction After Heart Transplantation: Optimal Timing of Application.

Exp Clin Transplant 2021 May 16;19(5):473-480. Epub 2021 Apr 16.

From the Department of Cardiac Surgery, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University, Düsseldorf, Germany.

Objectives: Primary graft dysfunction remains a serious problem after heart transplant. Pharmacological treatment with the calcium sensitizer levosimendan may be an additive treatment for primary graft dysfunction.

Materials And Methods: Patients undergoing heart transplant between 2010 and 2020 were retrospectively reviewed and divided depending on postoperative treatment with (n = 41) or without (n = 109) levosimendan. Recipients who received levosi mendan were further divided with regard to timing of levosimendan application (early group: started ≤48 hours posttransplant [n = 23]; late group: started >48 hours posttransplant [n = 18]).

Results: Patients who received levosimendan treatment displayed a remarkable incidence (87.8%) of postoperative primary graft dysfunction with need for venoarterial extracorporeal membrane oxygenation and therefore often presented with perioperative morbidity. Patient with early application of levosimendan showed significantly decreased duration of venoarterial extracorporeal membrane oxygenation support (5.1 ± 3.5 days vs 12.6 ± 9.3 days in those with late application; P < .01) and decreased mortality during venoarterial extracorporeal membrane oxygenation support (0.0% vs 33.3% in early vs late group; P < .01). In addition, compared with patients with late levosimendan application, patients with early application needed fewer blood transfusions (P < .05), had shorter ventilation times (279 ± 235 vs 428 ± 293 h; P = .03), and showed a trend of reduced incidence of postoperative renal failure (69.6% vs 94.4%; P = .06). Moreover, survival analyses indicated an increased survival for patients with early start of levosimendan therapy within the first 48 hours after heart transplant (P = .09).

Conclusions: Pharmacotherapy with levosimendan may be a promising additive in the treatment of primary graft dysfunction after heart transplant. With administration of levosimendan within the first 48 hours posttransplant, rates of successful weaning from venoarterial extracorporeal membrane oxygenation and outcomes after heart transplant were shown to increase.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.6002/ect.2020.0342DOI Listing
May 2021

Impact of Reported Donor Ejection Fraction on Outcome after Heart Transplantation.

Thorac Cardiovasc Surg 2021 Sep 16;69(6):490-496. Epub 2021 Apr 16.

Department of Cardiac Surgery, University Hospital, Duesseldorf, Germany.

Objectives:  The global shortage of donor organs has urged transplanting units to extend donor selection criteria, for example, impaired left ventricular function (LVF), leading to the use of marginal donor hearts. We retrospectively analyzed our patients after orthotopic heart transplantation (oHTX) with a focus on the clinical outcome depending on donor LVF.

Methods:  Donor reports, intraoperative, echocardiographic, and clinical follow-up data of patients undergoing oHTX at a single-center between September 2010 and June 2020 were retrospectively analyzed. Recipients were divided into two groups based on donor left ventricular ejection fraction (dLVEF): impaired dLVEF (group I; dLVEF ≤ 50%;  = 23) and normal dLVEF group (group N; dLVEF > 50%;  = 137).

Results:  There was no difference in 30-day, 90-day, and 1-year survival. However, the duration of in-hospital stay was statistically longer in group I than in group N (N: 40.9 ± 28.3 days vs. I: 55.9 ± 39.4 days,  < 0.05). Furthermore, postoperative infection events were significantly more frequent in group I ( = 0.03), which was also supported by multivariate analysis ( = 0.03; odds ratio: 2.96; confidence interval: 1.12-7.83). Upon correlation analysis, dLVEF and recipient LVEF prove as statistically independent ( = 0.12,  = 0.17).

Conclusions:  Impaired dLVEF is associated with prolonged posttransplant recovery and slightly increased morbidity but has no significant impact on survival up to 1 year posttransplant.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1055/s-0041-1725179DOI Listing
September 2021

Impact of standardized computed tomographic angiography for minimally invasive mitral and tricuspid valve surgery.

J Cardiothorac Surg 2021 Mar 20;16(1):34. Epub 2021 Mar 20.

Department of Cardiac Surgery, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Moorenstr. 5, 40225, Düsseldorf, Germany.

Background: Femoral cannulation for extracorporeal circulation (ECC) is a standard procedure for minimally invasive cardiac surgery (MICS) of the atrio-ventricular valves. Vascular pathologies may cause serious complications. Preoperative computed tomography-angiography (CT-A) of the aorta, axillary and iliac arteries was implemented at our department.

Methods: Between July 2017 and December 2018 all MICS were retrospectively reviewed (n = 143), and divided into 3 groups.

Results: In patients without CT (n = 45, 31.5%) ECC was applied via femoral arteries (91.1% right, 8.9% left). Vascular related complications (dissection, stroke, coronary and visceral ischemia, related in-hospital death) occurred in 3 patients (6.7%). In patients with non-contrast CT (n = 35, 24.5%) only femoral cannulation was applied (94.3% right) with complications in 4 patients (11.4%). CT-angiography (n = 63, 44.1%) identified 12 patients (19.0%) with vulnerable plaques, 7 patients (11.1%) with kinking of iliac vessels, 41 patients (65.1%) with multiple calcified plaques and 5 patients (7.9%) with small femoral artery diameter (d ≤ 6 mm). In 7 patients (11.1%) pathologic findings led to alternative cannulation via right axillary artery, additional 4 patients (6.3%) were cannulated via left femoral artery. Only 2 patients (3.2%) suffered from complications.

Conclusions: CT-A identifies vascular pathologies otherwise undetectable in routine preoperative preparation. A standardized imaging protocol may help to customize the operative strategy.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1186/s13019-021-01400-6DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7981880PMC
March 2021

AdipoRon Attenuates Inflammation and Impairment of Cardiac Function Associated With Cardiopulmonary Bypass-Induced Systemic Inflammatory Response Syndrome.

J Am Heart Assoc 2021 03 5;10(6):e018097. Epub 2021 Mar 5.

Department of Cardiac Surgery Düsseldorf University Hospital Düsseldorf Germany.

Background Cardiac surgery using cardiopulmonary bypass (CPB) frequently provokes a systemic inflammatory response syndrome, which is triggered by TLR4 (Toll-like receptor 4) and TNF-α (tumor necrosis factor α) signaling. Here, we investigated whether the adiponectin receptor 1 and 2 agonist AdipoRon modulates CPB-induced inflammation and cardiac dysfunction. Methods and Results Rats underwent CPB with deep hypothermic circulatory arrest and were finally weaned from the heart-lung machine. Compared with vehicle, AdipoRon application attenuated the CPB-induced impairment of mean arterial pressure following deep hypothermic circulatory arrest. During the weaning and postweaning phases, heart rate and mean arterial pressure in all AdipoRon animals (7 of 7) remained stable, while cardiac rhythm was irretrievably lost in 2 of 7 of the vehicle-treated animals. The AdipoRon-mediated improvements of cardiocirculatory parameters were accompanied by increased plasma levels of IL (interleukin) 10 and diminished concentrations of lactate and K. In myocardial tissue, AdipoRon activated AMP-activated protein kinase (AMPK) while attenuating CPB-induced degradation of nuclear factor κB inhibitor α (IκBα), upregulation of TNF-α, IL-1β, CCL2 (C-C chemokine ligand 2), nicotinamide adenine dinucleotide phosphate (NADPH) oxidase, and inducible nitric oxide synthase. Correspondingly, in cultured cardiac myocytes, cardiac fibroblasts, and vascular endothelial cells, AdipoRon activated AMPK, upregulated IL-10, and attenuated activation of nuclear factor κB, as well as upregulation of TNF-α, IL-1β, CCL2, NADPH oxidase, and inducible nitric oxide synthase induced by lipopolysaccharide or TNF-α. In addition, the treatment of cardiac myocytes with the AMPK activator 5-aminoimidazole-4-carboxamide 1-β-D-ribofuranoside resulted in a similar inhibition of lipopolysaccharide- and TNF-α-induced inflammatory cell phenotypes as for AdipoRon. Conclusions Our observations indicate that AdipoRon attenuates CPB-induced inflammation and impairment of cardiac function through AMPK-mediated inhibition of proinflammatory TLR4 and TNF-α signaling in cardiac cells and upregulation of immunosuppressive IL-10.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1161/JAHA.120.018097DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8174216PMC
March 2021

Response to letter to the editor: "Association between iron deficiency and clinical outcomes following cardiac surgery".

J Card Surg 2021 06 2;36(6):2183. Epub 2021 Mar 2.

Department of Cardiac Surgery, Heinrich-Heine-University Medical School, Düsseldorf, Germany.

View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1111/jocs.15461DOI Listing
June 2021

Less Invasive Left Ventricular Assist Device Implantation With the Furoshiki Technique.

Ann Thorac Surg 2021 06 22;111(6):e451-e453. Epub 2021 Feb 22.

Department of Cardiac Surgery and Research Group for Experimental Surgery, Medical Faculty, Heinrich Heine University, Düsseldorf, Germany.

In recent years, a less invasive approach has progressively become the first choice for left ventricular assist device (LVAD) implantation. However, in the setting of bridge to transplantation, device-related dense adhesions, particularly at the thoracotomy site, still remain a cumbersome problem at the time of heart transplantation. We propose a technique termed "Furoshiki" with the double wrapping of the LVAD at the primary less invasive implantation consisting of complete wrapping of the LVAD with expanded polytetrafluoroethylene as the first step and complete closure of the pericardial continuity with bovine pericardial patch plasty as the second step.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.athoracsur.2020.11.091DOI Listing
June 2021

Predictive Value of Body Mass Index in Minimally Invasive Mitral Valve Surgery.

Thorac Cardiovasc Surg 2021 Feb 12. Epub 2021 Feb 12.

Department of Cardiac Surgery, Medical Faculty, Heinrich Heine University, Dusseldorf, Germany.

Background:  With this study we aimed to analyze if the separate consideration of body mass index (BMI) could provide any superior predictive values compared with the established risk scores in isolated minimally invasive mitral valve surgery (MIMVS). This might facilitate future therapeutic decision-making, e.g., regarding the question surgery versus transcatheter mitral valve repair (TMVr).

Methods:  We assessed the relevance of BMI in non-underweight patients who underwent isolated MIMVS. The risk predictive potential of BMI for mortality and several postoperative adverse events was assessed in 429 consecutive patients. This predictive potential was compared with that of European System for Cardiac Outcome Risk Evaluation II (EuroSCORE II) and the Society of Thoracic Surgeons score (STS score) using a comparative receiver operating characteristic curve analysis.

Results:  BMI was a significant numeric predictor of wound healing disorders ( = 0.001) and proved to be significantly superior in case of this postoperative adverse event compared with the EuroSCORE II ( = 0.040) and STS score ( = 0.015). Except for this, the predictive potential of BMI was significantly inferior compared with that of the EuroSCORE II and STS score for several end points, including 30-day ( = 0.029 and  = 0.006) and 1-year ( = 0.012 and  = 0.001) mortality.

Conclusion:  Therefore, we suggest that, in the course of decision-making regarding the right treatment modality for non-underweight patients with isolated mitral valve regurgitation, the sole factor of BMI should not be given a predominant weight.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1055/s-0041-1723973DOI Listing
February 2021

Complications of left ventricular assist devices causing high urgency status on waiting list: impact on outcome after heart transplantation.

ESC Heart Fail 2021 04 21;8(2):1253-1262. Epub 2021 Jan 21.

Clinic for Thoracic and Cardiovascular Surgery, Heart and Diabetes Center North Rhine-Westphalia, Georgstrasse 11, Bad Oeynhausen, 32545, Germany.

Aims: Heart transplantation (HTx) represents optimal care for advanced heart failure. Left ventricular assist devices (LVADs) are often needed as a bridge-to-transplant (BTT) therapy to support patients during the wait for a donor organ. Prolonged support increases the risk for LVAD complications that may affect the outcome after HTx.

Methods And Results: A total of 342 patients undergoing HTx after LVAD as BTT in a 10-year period in two German high-volume HTx centres were retrospectively analysed. While 73 patients were transplanted without LVAD complications and with regular waiting list status (T, n = 73), the remaining 269 patients were transplanted with high urgency status (HU) and further divided with regard to the observed leading LVAD complications (infection: HU1, n = 91; thrombosis: HU2, n = 32; stroke: HU3, n = 38; right heart failure: HU4, n = 41; arrhythmia: HU5, n = 23; bleeding: HU6, n = 18; device malfunction: HU7, n = 26). Postoperative hospitalization was prolonged in patients with LVAD complications. Analyses of perioperative morbidity revealed no differences regarding primary graft dysfunction, renal failure, and neurological events except postoperative infections. Short-term survival, as well as Kaplan-Meier survival analysis, indicated comparable results between the different study groups without disadvantages for patients with LVAD complications.

Conclusions: Left ventricular assist device therapy can impair the outcome after HTx. However, the occurrence of LVAD complications may not impact on outcome after HTx. Thus, we cannot support the prioritization or discrimination of HTx candidates according to distinct mechanical circulatory support-associated complications. Future allocation strategies have to respect that device-related complications may define urgency but do not impact on the outcome after HTx.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1002/ehf2.13188DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8006689PMC
April 2021

Effects of Donor Age and Ischemia Time on Outcome After Heart Transplant: A 10-Year Single-Center Experience.

Exp Clin Transplant 2021 Apr 11;19(4):351-358. Epub 2021 Jan 11.

From the Department of Cardiac Surgery, Heinrich-Heine-University Medical School, Duesseldorf, Germany.

Objectives: In heart failure patients, heart transplant still remains the gold standard of care. Controversy prevails whether organs from older donors or with expected prolonged ischemia times may be accepted for transplant.

Materials And Methods: Between 2010 and 2020, a total of 149 patients underwent heart transplant at our department. In a retrospective analysis, 4 different groups were defined according to donor age and total ischemia time. The younger group with short ischemia time consisted of 62 donors age < 50 years and total ischemia time < 240 minutes; the younger group with long ischemia time consisted of 32 donors age < 50 years and total ischemia time ≥ 240 minutes; the older group with short ischemia time consisted of 43 donors age ≥ 50 years and total ischemia time < 240 minutes; and the older group with long ischemia time consisted of 12 donors age ≥ 50 years and total ischemia time ≥ 240 minutes.

Results: Prolonged total ischemia time increased the risk of primary graft dysfunction (P = .02) and perioperative neurological events (P = .04). In contrast, there were no differences regarding durations of intensive care unit stay and hospital stay, perioperative bleeding, and renal failure. Although the younger donor age group showed excellent short-term survival (30-day survival rates of 97% for the younger group with short ischemia time and 91% for the younger group with long ischemia time), short-term and mid-term survival rates were impaired in patients with prolonged total ischemia time and older donor age (P = .02).

Conclusions: Our results indicate that, in younger donors, prolonged ischemia times may be acceptable. However, in donors older than 50 years, the decision for acceptance as a donor should be made with great caution if the presumed ischemia time exceeds 4 hours.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.6002/ect.2020.0279DOI Listing
April 2021
-->