Ventricular standstill: An uncommon electrophysiological abnormality caused by profound vagal tone.
BACKGROUND
Ventricular standstill (VS) is an uncommon electrophysiological phenomenon and usually manifests as syncope. Rarely has a case been reported where the patient has been totally asymptomatic, and it has resolved spontaneously.


METHODS
We report a case of complete VS and high-degree atrioventricular (AV) block in a 50-year-old female, who was admitted for nausea, vomiting, and chest pain. The patient never had a syncopal episode, even though she was in VS for more than 10 s.


CONCLUSIONS
Such degree of conduction abnormality without any syncope has not been reported so far. Her electrophysiological abnormality was attributed to profound vagotonic effect and was treated with a permanent pacemaker.
Department of Internal Medicine, Cardiology and Nuclear Cardiology, University of Alabama at Birmingham Health Center Montgomery, Montgomery, Alabama 36116, US.
Shikha
S
Jaiswal
Department of Internal Medicine, Cardiology and Nuclear Cardiology, University of Alabama at Birmingham Health Center Montgomery, Montgomery, Alabama 36116, US.
Adrian Pedro Noriega
AP
Aldave
Internal Medicine, Cardiology and Nuclear Cardiology, University of Alabama at Birmingham Health Center Montgomery, Montgomery, Alabama 36116, US.
Kenneth J
KJ
Wool
High-degree AV blocks; Pacemaker; Syncope; Vagal tone; Ventricular standstill