Polarcardiographic analysis by automated digital minicomputer.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D003201:Computers; D004562:Electrocardiography; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008905:Minicomputers; D009203:Myocardial Infarction / Q000175:diagnosis*; D012737:Sex Factors; D012907:Smoking; D014672:Vectorcardiography