Frequency and significance of late evolution of Q waves in patients with initial non-Q-wave acute myocardial infarction. Diltiazem Reinfarction Study Group.


Serial 12-lead electrocardiogram and plasma creatine kinase (CK)-MB values from 544 patients with confirmed non-Q-wave acute myocardial infarction (AMI) were analyzed to define the rate of progression of non-Q-wave AMI to Q-wave AMI and to examine its relation to CK-MB evidence of extension. The baseline electrocardiogram was obtained 50 +/- 10 hours after… (More)