Metabolic Changes in Nonischemic Myocardium During Pump Failure

Metabolic changes in the nonischemic myocardium after acute myocardial infarction in canine hearts were studied. Ca2+-ATPase activity and the major ATPase protein of the sarcoplasmic reticulum, tissue levels of ATP, mitochondrial respiratory, and complex I activities were decreased in the noninfarcted zone in proportion to heart function. It is suggested that recovery of these functions may be important in any treatment of pump failure.