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