BACKGROUND: Cold static storage (CS) is a proven preservation method for heart transplantion, yet early postoperative graft dysfunction remains prevalent, so continuous perfusion (CP) during ex vivo transport may improve viability and function of heart grafts. METHODS AND RESULTS: Canine hearts underwent CP (n=9) or CS (n=9) for 6 h while intramyocardial pH was continuously monitored. Biopsies were assayed for ATP, caspase-3, malondialdehyde (MDA), and endothelin-1 (ET-1) levels at baseline, after preservation (t1), and after 1 h of blood reperfusion on a Langendorff model (t2). Functional recovery was determined at t2 by +dP/dt, -dP/dt, developed pressure, peak pressure and end-diastolic pressure. CP resulted in higher tissue pH and ATP stores and reduced caspase-3, MDA and ET-1 levels compared with CS at both t1 and t2. Post reperfusion recovery was significantly greater in CP vs CS for all myocardial functional parameters except end-diastolic pressure. Weight gain was significantly increased in CP vs CS at t1, but not at t2. CONCLUSIONS: Low-grade tissue acidosis and energy depletion occur during CS and are associated with oxidative injury and apoptosis during reperfusion. CP attenuates these biochemical and pathologic manifestations of tissue injury, together with improved myocardial recovery, despite mild, transient edema.
BACKGROUND: Cold static storage (CS) is a proven preservation method for heart transplantion, yet early postoperative graft dysfunction remains prevalent, so continuous perfusion (CP) during ex vivo transport may improve viability and function of heart grafts. METHODS AND RESULTS:Canine hearts underwent CP (n=9) or CS (n=9) for 6 h while intramyocardial pH was continuously monitored. Biopsies were assayed for ATP, caspase-3, malondialdehyde (MDA), and endothelin-1 (ET-1) levels at baseline, after preservation (t1), and after 1 h of blood reperfusion on a Langendorff model (t2). Functional recovery was determined at t2 by +dP/dt, -dP/dt, developed pressure, peak pressure and end-diastolic pressure. CP resulted in higher tissue pH and ATP stores and reduced caspase-3, MDA and ET-1 levels compared with CS at both t1 and t2. Post reperfusion recovery was significantly greater in CP vs CS for all myocardial functional parameters except end-diastolic pressure. Weight gain was significantly increased in CP vs CS at t1, but not at t2. CONCLUSIONS: Low-grade tissue acidosis and energy depletion occur during CS and are associated with oxidative injury and apoptosis during reperfusion. CP attenuates these biochemical and pathologic manifestations of tissue injury, together with improved myocardial recovery, despite mild, transient edema.
Authors: Sebastian G Michel; Glenn M La Muraglia; Maria Lucia L Madariaga; James S Titus; Martin K Selig; Evan A Farkash; James S Allan; Lisa M Anderson; Joren C Madsen Journal: Ann Transplant Date: 2014-08-20 Impact factor: 1.530
Authors: Martina Bona; Rahel K Wyss; Maria Arnold; Natalia Méndez-Carmona; Maria N Sanz; Dominik Günsch; Lucio Barile; Thierry P Carrel; Sarah L Longnus Journal: J Am Heart Assoc Date: 2021-01-30 Impact factor: 5.501
Authors: Matthew A Schechter; Kevin W Southerland; Bryan J Feger; Dean Linder; Ayyaz A Ali; Linda Njoroge; Carmelo A Milano; Dawn E Bowles Journal: J Vis Exp Date: 2014-06-11 Impact factor: 1.355
Authors: Christopher W White; Simon J Messer; Stephen R Large; Jennifer Conway; Daniel H Kim; Demetrios J Kutsogiannis; Jayan Nagendran; Darren H Freed Journal: Front Cardiovasc Med Date: 2018-02-13