T-wave inversions.
D000368:Aged; D002304:Cardiac Pacing, Artificial / Q000009:adverse effects; D003327:Coronary Disease / Q000175:diagnosis / Q000209:etiology; D003937:Diagnosis, Differential; D004562:Electrocardiography; D005260:Female; D006339:Heart Rate; D006801:Humans; D009203:Myocardial Infarction / Q000175:diagnosis / Q000209:etiology