title: The value of obligatory preoperative electrocardiograms. A survey of 1260 patients.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D004562:Electrocardiography; D005260:Female; D006306:Health Surveys; D006331:Heart Diseases / Q000453:epidemiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009518:New York; D011300:Preoperative Care