title: Partial atrial standstill: a case report.
abstract: Twelve-lead electrocardiograms revealed no atrial activity and a wide QRS escape rhythm at 38 beats/min in a 20-year-old man who presented with syncope. Doppler echocardiography documented the absence of A wave both in the tricuspid and mitral valve flow. The only mechanical activity was documented at the left atrial appendage. An electrophysiologic study demonstrated electrical inactivity in the right atrium and an atrial tachycardia in the left atrium. Atrial pacing with maximum output did not capture the atria. Our case represents an advanced stage of partial atrial standstill, with a mechanical and electrical atrial activity confined only to the left trial appendage. The patient remained asymptomatic after receiving a VVIR pacemaker and anticoagulation therapy.
authors: Electrophysiology Section, Department of Cardiology, Gulhane Military Medical Academy Haydarpasa Training Hospital, 34668 Istanbul, Turkey.
authors: Ergun
authors: E
authors: Demiralp
authors: Ata
authors: A
authors: Kirilmaz
authors: Bekir Sitki
authors: BS
authors: Cebeci
authors: Rifat Eralp
authors: RE
authors: Ulusoy
mesh_terms: D000328:Adult; D000925:Anticoagulants / Q000627:therapeutic use; D001145:Arrhythmias, Cardiac / Q000175:diagnosis* / Q000000981:diagnostic imaging; D020517:Atrial Appendage / Q000000981:diagnostic imaging; D002304:Cardiac Pacing, Artificial; D015150:Echocardiography, Doppler; D004562:Electrocardiography; D006325:Heart Atria / Q000000981:diagnostic imaging / Q000503:physiopathology; D006801:Humans; D008297:Male; D008944:Mitral Valve Insufficiency / Q000000981:diagnostic imaging; D013575:Syncope / Q000175:diagnosis; D013610:Tachycardia / Q000175:diagnosis; D014262:Tricuspid Valve Insufficiency / Q000000981:diagnostic imaging
chemical_list: D000925:Anticoagulants