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Preoperative higher right ventricular stroke work index increases the risk of de novo aortic insufficiency after continuous-flow left ventricular assist device implantation
This study investigated the influence of preoperative hemodynamic parameters on de novo AI in CF-LVAD recipients. We reviewed 125 patients who underwent CF-LVAD implantation without concomitant AV surgery between 2005 and 2018. De novo AI was defined as moderate or severe AI in those with none or trivial preoperative AI. During mean 30  ± 16 months of CF-LVAD support, de novo AI-free rate was 86% and 67% at 1 and 2 years, respectively. Multivariable analysis showed that higher right ventricular stroke work index (RVSWI) (hazard ratio, 1.12 /g/m2/beat; 95% confidence interval, 1.00 –1.20;p = 0.047) and trivial ...
Source: Journal of Artificial Organs - July 19, 2023 Category: Transplant Surgery Source Type: research

Concomitant intra-aortic balloon pump and veno-arterial extracorporeal membrane oxygenation for postcardiotomy cardiogenic shock
Int J Artif Organs. 2023 Apr 26:3913988231170890. doi: 10.1177/03913988231170890. Online ahead of print.ABSTRACTWe aimed to compare the outcomes of ECMO with and without IABP for postcardiotomy cardiogenic shock. The study included 103 patients who needed ECMO for postcardiotomy cardiogenic shock. Patients were grouped according to the use of IABP into ECMO without IABP (n = 43) and ECMO with IABP (n = 60). The study endpoints were hospital complications, successful weaning, and survival. Patients with IABP had lower preoperative ejection fraction (p = 0.002). There was no difference in stroke (p = 0.97), limb ischemic (p ...
Source: The International Journal of Artificial Organs - May 1, 2023 Category: Transplant Surgery Authors: Amr A Arafat Abdulmalik A Almedimigh Khaled D Algarni Huda H Ismail Claudio Pragliola Adam I Adam Mohammed AlBarrak Ahmed Osman Monirah A Albabtain Tarek M Tantawy Source Type: research

Impact of Mitral Valve Prosthesis on Stroke after Insertion of Veno-Arterial Membrane Oxygenation for Postcardiotomy Shock
This study focused on stroke after valve surgery requiring VA-ECMO.
Source: The Journal of Heart and Lung Transplantation - March 20, 2021 Category: Transplant Surgery Authors: S. Ohira, D. Spielvogel, R. Malekan, J.B. Goldberg, P.J. Spencer, S.L. Lansman, M. Kai Tags: 1026 Source Type: research

Can the intermittent low-speed function of left ventricular assist device prevent aortic insufficiency?
In this study, the Jarvik 2000 device, which is programmed to reduce the pump speed each minute for 8  s, was chosen to examine this potential effect. Prospectively collected data of 85 heart transplant-eligible Jarvik 2000 recipients who met the study criteria (no pre-existing AI and aortic valve surgery) were retrospectively analyzed for the incidence, correlating factors, and clinical outcomes o f de novo AI. All data were provided by the Japanese Registry for Mechanically Assisted Circulatory Support. De novo AI occurred in 58 patients, 23 of whom developed at least moderate AI during a median support duration of 23.5...
Source: Journal of Artificial Organs - January 9, 2021 Category: Transplant Surgery Source Type: research

Type II Minimal ‐Invasive Extracorporeal Circuit for Aortic Valve Replacement: A Randomized Controlled Trial
Abstract Extracorporeal circulation triggers systemic inflammatory response and coagulation disorders which may lead to unfavorable clinical outcome. A type II minimally‐invasive extracorporeal circuit (MiECC) is a closed system with markedly reduced artificial surface as compared to conventional extracorporeal circuits (CECC). The aim of this study was to investigate and compare inflammatory responses, complement activation and selected clinical end‐points in isolated surgical aortic valve replacement (SAVR) performed with a type II MiECC circuit or a CECC. Fifty patients were prospectively randomized to MiECC or CECC...
Source: Artificial Organs - February 12, 2018 Category: Transplant Surgery Authors: Erich Gygax, Hans ‐Ulrich Kaeser, Mario Stalder, Brigitta Gahl, Robert Rieben, Thierry Carrel, Gabor Erdoes Tags: Main Text Source Type: research

Experimental Investigation of Left Ventricular Flow Patterns After Percutaneous Edge ‐to‐Edge Mitral Valve Repair
Abstract Mitral valve percutaneous edge‐to‐edge repair (PEtER) is a viable solution in high‐risk patients with severe symptomatic mitral regurgitation. However, the generated double‐orifice configuration poses challenges for the evaluation of the hemodynamic performance of the mitral valve and may alter flow patterns in the left ventricle (LV) during diastole. This in vitro study aims to evaluate the hemodynamic modifications following a simulated PEtER. A custom‐made mitral valve was developed, and two configurations were tested: (i) a single‐orifice valve with mitral regurgitation and (ii) a double‐orifice ...
Source: Artificial Organs - November 1, 2017 Category: Transplant Surgery Authors: Morteza Jeyhani, Shahrokh Shahriari, Michel Labrosse Tags: Main Text Source Type: research

Mid-term results of 17-mm St. Jude Medical Regent prosthetic valves in elder patients with small aortic annuli: comparison with 19-mm bioprosthetic valves
This study was designed to compare the mid-term outcomes after aortic valve replacement (AVR) between 17-mm mechanical heart valves (MV) and 19-mm bioprosthetic valves (BV) in elderly patients with small aortic annuli. Between 2000 and 2011, 127 consecutive patients (mean age 79 years; 87 % female) underwent AVR for aortic valve stenosis with a small aortic annulus. 19-mm BV (n = 67) was implanted. When the 19-mm BV did not fit the annulus, 17-mm St. Jude Medical Regent prosthetic mechanical valve (n = 60) was used instead of an aortic root-enlargement procedure. The follow-up rate was 94.0 % in the BV group, and 98...
Source: Journal of Artificial Organs - September 1, 2014 Category: Transplant Surgery Source Type: research

Cardiac energetics analysis after aortic valve replacement with 16-mm ATS mechanical valve
Abstract The 16-mm ATS mechanical valve is one of the smallest prosthetic valves used for aortic valve replacement (AVR) in patients with a very small aortic annulus, and its clinical outcomes are reportedly satisfactory. Here, we analyzed the left ventricular (LV) performance after AVR with the 16-mm ATS mechanical valve, based on the concept of cardiac energetics analysis. Eleven patients who underwent AVR with the 16-mm ATS mechanical valve were enrolled in this study. All underwent echocardiographic examination at three time points: before AVR, approximately 1 month after AVR, and approximately 1 year after...
Source: Journal of Artificial Organs - September 1, 2014 Category: Transplant Surgery Source Type: research

Efficacy of Prophylactic Intra‐Aortic Balloon Pump Therapy in Chronic Heart Failure Patients Undergoing Cardiac Surgery
This study investigated the efficacy of prophylactic intraoperative intra‐aortic balloon pump (IABP) usage in chronic heart failure patients with severely reduced left ventricular function undergoing elective cardiac surgery. Between January 2008 and December 2012, 107 patients with severely reduced left ventricular ejection fraction (LVEF <35%) received prophylactic intraoperative IABP implantation during open‐heart surgery. Surgical procedures performed were isolated coronary artery bypass grafting (CABG) in 35 patients (32.7%), aortic valve replacement in 12 (11.2%), mitral valve repair or replacement in 15 (14.0...
Source: Artificial Organs - February 1, 2014 Category: Transplant Surgery Authors: Yalin Yildirim, Simon Pecha, Mathias Kubik, Yousuf Alassar, Tobias Deuse, Samer Hakmi, Hermann Reichenspurner Tags: Thoughts and Progress Source Type: research