Optimal Pressure for Low Pressure Controlled Reperfusion to Efficiently Protect Ischemic Heart: An Experimental Study in Rats

C. Nemlin, S. Benhabbouche, J. C. Bopassa, L. Sebbag, M. Ovize, R. Ferrera

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Recent work has demonstrated the benefit of low pressure (LP) reperfusion to protect the heart undergoing an ischemic insult. The goal of the present study was to determine the optimal pressure for the application of LP reperfusion. Isolated rats hearts (n = 30) were exposed to 40 minutes of global warm ischemia followed by 70 minutes of reperfusion with a pressure fixed at 100 cm H2O (normal pressure [NP] = control group), 85 cm (group LP [low pressure]-85), 70 cm (group LP-70), or 55 cm (group LP-55). Cardiac function was assessed during reperfusion using the Langendorff model. Myocardial necrosis was assessed by measuring lactate dehydrogenase (LDH) and creatine kinase (CK) leakage in the coronary effluents. Functional recovery was progressively and significantly improved with decreased perfusion pressure. Rate-pressure product (RPP) averaged 3765 ± 408, 6824 ± 439, and 12,036 ± 664 mm Hg/min, respectively, among the control, LP-85, and LP-70 groups (P < .001, LP-70 vs other groups). However, RPP collapsed in the LP-55 group. Similarly, necrosis as measured by LDH and CK leakage progressively reduced between LP-100 and LP-70 hearts (P < .01), with a drastic increase in enzyme in the LP-55 group. In conclusion, this study demonstrated that 70 cm H2O is an optimal LP to improve postischemic contractile dysfunction and attenuate necrosis during reperfusion.

Original languageEnglish (US)
Pages (from-to)703-704
Number of pages2
JournalTransplantation Proceedings
Volume41
Issue number2
DOIs
StatePublished - Mar 1 2009
Externally publishedYes

ASJC Scopus subject areas

  • Surgery
  • Transplantation

Fingerprint Dive into the research topics of 'Optimal Pressure for Low Pressure Controlled Reperfusion to Efficiently Protect Ischemic Heart: An Experimental Study in Rats'. Together they form a unique fingerprint.

Cite this