Temporal alternation of atrial flutter sounds.
D001282:Atrial Flutter; D016275:Atrial Function; D002346:Carotid Sinus; D004562:Electrocardiography; D006326:Heart Auscultation; D006801:Humans; D008297:Male; D008875:Middle Aged; D010701:Phonocardiography; D013997:Time Factors