in 44 consecutive patients undergoing elective open heart surgery ( ohs ) , serial electrocardiograms ( ecg ) , vectorcardiograms ( vcg ) , serum cpk , cardiac isoenzymes ( cpkmb ) , and myocardial images using tc-99m pyrophosphate were obtained , before and after the operation , for the detection of acute myocardial infarction ( ami ) .
C0018787
cardiac
C0155626
acute myocardial infarction