title: Watch the p wave: it can change!
authors.forename: Patrick
authors.initials: P
authors.lastname: Yue
authors.forename: J Edwin
authors.initials: JE
authors.lastname: Atwood
authors.forename: Vic
authors.initials: V
authors.lastname: Froelicher
mesh_terms: D004562:Electrocardiography; D006329:Heart Conduction System / Q000503:physiopathology; D006801:Humans; D009203:Myocardial Infarction / Q000175:diagnosis* / Q000401:mortality; D029424:Pulmonary Disease, Chronic Obstructive / Q000150:complications*