[Studies on electrocardiographic changes before and after cardiac surgery. 1. Ventricular septal defects].
D000293:Adolescent; D000328:Adult; D002648:Child; D004562:Electrocardiography; D005260:Female; D006345:Heart Septal Defects, Ventricular / Q000601:surgery*; D006801:Humans; D008297:Male