Evaluation of the QRS complex on the standard 12-lead electrocardiogram in normal subjects 70 to 79 years of age.
D000368:Aged; D000375:Aging / Q000502:physiology*; D003327:Coronary Disease / Q000503:physiopathology; D004562:Electrocardiography; D005260:Female; D006321:Heart / Q000502:physiology*; D006801:Humans; D008297:Male; D012189:Retrospective Studies; D012680:Sensitivity and Specificity