[The P wave of the electrocardiogram].
D001281:Atrial Fibrillation / Q000175:diagnosis; D004562:Electrocardiography; D006325:Heart Atria / Q000503:physiopathology*; D006344:Heart Septal Defects, Atrial / Q000175:diagnosis; D006801:Humans; D009203:Myocardial Infarction / Q000175:diagnosis
EKG: n P-aalto.