EFFECTS OF AGE AND HEART DISEASE ON THE QRS AXIS DURING THE SEVENTH THROUGH THE TENTH DECADES.
D000375:Aging; D004562:Electrocardiography; D005853:Geriatrics; D006331:Heart Diseases; D006801:Humans; D013223:Statistics as Topic
AGING; ELECTROCARDIOGRAPHY; GERIATRICS; HEART DISEASES; STATISTICS