[Follow-up study of chronic cor pulmonale by echocardiography: its diagnostic value as compared with roentgenography and electrocardiography (author's transl)].
D002908:Chronic Disease; D004452:Echocardiography; D004562:Electrocardiography; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D011660:Pulmonary Heart Disease / Q000175:diagnosis* / Q000000981:diagnostic imaging; D011859:Radiography