Mena electrical QRS axis in the frontal plane in the electrocardiograms of middle-aged and elderly hospital patients.
D000328:Adult; D000367:Age Factors; D000368:Aged; D004562:Electrocardiography; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology; D006331:Heart Diseases / Q000503:physiopathology; D006801:Humans; D008171:Lung Diseases / Q000503:physiopathology; D008297:Male; D008875:Middle Aged