[Research on the value of EPV1 in the diagnosis of chronic cor pulmonale].
D000328:Adult; D000368:Aged; D002908:Chronic Disease; D004562:Electrocardiography; D004947:Esophagus; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011660:Pulmonary Heart Disease / Q000175:diagnosis*