Metabolic protection of post-ischemic phosphorylation potential and ventricular performance

Abstract

Relationships between cytosolic phosphorylation potential, low-flow ischemic purine release and post-ischemic left ventricular developed pressure were examined in perfused working guinea-pig heart. During moderate ischemic acidification, metabolic intervention by pyruvate attenuated cytosolic NADH accumulation and (ATP+ADP+AMP) degradation. In reperfusion, spontaneously developed ventricular pressure increased in parallel with the phosphorylation potential (R2 = 0.71), but forced restoration of function by inotropic measures occurred at the expense of the phosphorylation potential.