title: P-wave changes in chronic obstructive pulmonary disease.
mesh_terms: D001991:Bronchitis / Q000503:physiopathology*; D006332:Cardiomegaly / Q000000981:diagnostic imaging; D003936:Diagnosis, Computer-Assisted; D004562:Electrocardiography; D005260:Female; D006321:Heart / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011656:Pulmonary Emphysema / Q000503:physiopathology*; D011859:Radiography; D012129:Respiratory Function Tests