[Significance of ECG changes in the early stage of myocardial infarct].
D000328:Adult; D000368:Aged; D000818:Animals; D004285:Dogs; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000175:diagnosis*; D013997:Time Factors