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Related Experiment Videos

Unmasking of sinus node dysfunction by ajmaline.

R Bajaj1, U Kaul, J Narula

  • 1Department of Cardiology, All India Institute of Medical Sciences, New Delhi.

International Journal of Cardiology
|June 1, 1989
PubMed
Summary
This summary is machine-generated.

A 75-year-old man

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Area of Science:

  • Cardiology
  • Electrophysiology

Background:

  • Bifascicular block can indicate underlying conduction system disease.
  • Giddiness and presyncope are concerning symptoms requiring thorough investigation.

Observation:

  • A 75-year-old male presented with recurrent giddiness and presyncope.
  • Cardiac rhythm monitoring did not reveal arrhythmias.
  • An ajmaline stress test was performed.

Findings:

  • Ajmaline administration reproducibly induced sinus arrest.
  • This unmasked a previously undiagnosed (latent) sick sinus syndrome.

Implications:

  • The ajmaline stress test is a valuable tool for diagnosing latent sick sinus syndrome.
  • Early diagnosis and management of sick sinus syndrome can prevent syncope and improve patient outcomes.