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Ventricular standstill: An uncommon electrophysiological abnormality caused by profound vagal tone
Shikha Jaiswal1, Adrian Pedro Noriega Aldave1, Kenneth J Wool2
1Department of Internal Medicine, Cardiology and Nuclear Cardiology, University of Alabama at Birmingham Health Center Montgomery, Montgomery, Alabama 36116, US.
Context:
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.
Case Report:
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.
Conclusion:
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.