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Ischemic preconditioning enhances donor heart preservation

Ischemic preconditioning has not been assessed in an experimental model for myocardial preservation during heart transplantation. Using isolated working rat hearts, ischemic preconditioning was investigated as an adjunct to isolated hypothermic (group 1), crystalloid (group 2: University of Wisconsi...

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Hauptverfasser: Karck, Matthias (VerfasserIn) , Rahmanian, Parwis B. (VerfasserIn) , Haverich, Axel (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: July 15, 1996
In: Transplantation
Year: 1996, Jahrgang: 62, Heft: 1, Pages: 17-22
ISSN:1534-6080
DOI:10.1097/00007890-199607150-00004
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1097/00007890-199607150-00004
Verlag, lizenzpflichtig, Volltext: https://journals.lww.com/transplantjournal/Fulltext/1996/07150/ISCHEMIC_PRECONDITIONING_ENHANCES_DONOR_HEART.4.aspx
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Verfasserangaben:Matthias Karck, Parwis Rahmanian, Axel Haverich

MARC

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520 |a Ischemic preconditioning has not been assessed in an experimental model for myocardial preservation during heart transplantation. Using isolated working rat hearts, ischemic preconditioning was investigated as an adjunct to isolated hypothermic (group 1), crystalloid (group 2: University of Wisconsin solution; group 3: St. Thomas' Hospital cardioplegic solution II; group 4: Bretschneiders' cardioplegic solution), and noncrystalloid (group 5: cold blood cardioplegia) preservation during a 10-hr period of global ischemia at 4°C. After acquisition of functional baseline data, ischemic preconditioning was induced with one cycle of 5 min of normothermic ischemia and 5 min of reperfusion before induction of global hypothermic ischemia(n=10/group). Nonpreconditioned hearts (n=10/group) were assessed for control. Ischemic preconditioning improved postischemic functional recovery. Thus, aortic flow after 60 min of reperfusion recovered to 0%, 8%, 0%, 1%, and 0% in control groups 1 to 5 without ischemic preconditioning and 21%, 25%, 10%, 8%, and 3% in groups 1 to 5 with ischemic preconditioning. The same pattern of recovery was observed in regard to postischemic maximum developed left ventricular pressure, which recovered to 21%, 56%, 30%, 36%, and 19% in groups 1 to 5 without preconditioning and 46%, 75%, 49%, 40%, and 47% in the corresponding groups with ischemic preconditioning. High-energy phosphate contents were not significantly different between preconditioned hearts and corresponding nonpreconditioned control hearts. Creatine kinase leakage during early reperfusion was found to be reduced with ischemic preconditioning. Thus, we have demonstrated that ischemic preconditioning can improve contractile function after global hypothermic ischemia in the isolated rat heart and we have shown that this protection is additive to that of hypothermia-induced protection during global ischemia at 4 °C. This endogenous mechanism of cardioprotection was effective regardless of whether preservation was accomplished using cardioplegic solution or topical hypothermia alone. This may have clinical implications in myocardial preservation for heart transplantation. 
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