cardiac muscle biopsy specimens were obtained from 33 patients undergoing open-heart surgery under k+-induced ischemic arrest in hypothermia ( cardioplegic right atrial and right ventricular muscles ) or under hypothermic ischemic arrest without k+-cardioplegia ( noncardioplegia right atrial muscle ) , and sequential patterns of changes in the myocardial metabolism were studied by standard enzymatic techniques .
C0018787
cardiac
C0225844
right atrial