Implantable cardioverter-defibrillator implantation in a patient with atrial standstill.
We report a 55-year-old female patient who presented with no P waves but with a wide QRS complex escape rhythm at 44 beats/min and prolonged QTc of 0.55 seconds on ECG. The patient had recurrence of ventricular fibrillations and loss of consciousness, and underwent defibrillation and cardiopulmonary resuscitation (CPR) several times because of cardiac arrest. The transthoracic echocardiography showed dilated cardiomyopathy and enlargement of both atria. The Doppler echocardiography documented the absence of A wave in the tricuspid and mitral valve flow. An electrophysiologic study demonstrated electrical inactivity in the right and left atria. Atrial pacing with maximum output did not capture the atria. These findings together with her electrocardiographic finding indicated atrial standstill. Sudden cardiac death was her first clinical manifestation of ventricular arrhythmia. The patient remained asymptomatic after receiving a single chamber implantable cardioverter-defibrillator (ICD) with VVI pacemaker function.
Park
So Ra
SR
Department of Internal Medicine, Gyeongsang National University College of Medicine, Jinju, Korea.
Kwak
Choong Hwan
CH
Kang
Young Ran
YR
Seo
Myung Ki
MK
Kang
Min Kyung
MK
Cho
Jung Hyun
JH
Ahn
Yeon Jeong
YJ
Hwang
Jin Yong
JY
D001919:Bradycardia / Q000175:diagnosis* / Q000628:therapy*; D002311:Cardiomyopathy, Dilated / Q000628:therapy*; D016757:Death, Sudden, Cardiac; D017147:Defibrillators, Implantable; D004562:Electrocardiography; D005260:Female; D006325:Heart Atria; D006801:Humans; D008875:Middle Aged; D014693:Ventricular Fibrillation / Q000175:diagnosis / Q000628:therapy