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Related Experiment Videos

Recurrent unexplained syncope: diagnostic and therapeutic approach

A D Krahn1, G J Klein, R Yee

  • 1Department of Medicine, University of Western Ontario, London. akrahn@julian.uwo.ca

The Canadian Journal of Cardiology
|October 1, 1996
PubMed
Summary

Diagnosing recurrent syncope (fainting) is challenging due to unpredictable episodes. An insertable loop recorder shows promise for identifying the cause when other tests fail, improving diagnosis for fainting patients.

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Area of Science:

  • Cardiology
  • Neurology

Background:

  • Recurrent syncope of unknown etiology presents diagnostic challenges.
  • Conventional monitoring often fails to capture infrequent, unpredictable syncopal episodes.
  • Symptom-rhythm correlation is difficult to establish in many patients.

Purpose of the Study:

  • To review the diagnostic utility of various monitoring techniques for syncope.
  • To highlight the limitations of current diagnostic methods.
  • To explore the potential of novel monitoring devices.

Main Methods:

  • Review of existing literature on syncope investigation.
  • Discussion of conventional ambulatory monitoring limitations.
  • Evaluation of external loop recorders and insertable loop recorders.

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Main Results:

  • Electrophysiological testing has limited utility, especially in patients without structural heart disease.
  • External loop recorders face compliance and technical challenges.
  • Insertable loop recorders demonstrate high diagnostic yield across various etiologies.

Conclusions:

  • Diagnosing syncope remains difficult, often relying on inference and empirical trials.
  • Insertable loop recorders offer a promising solution for diagnosing recurrent syncope.
  • Future investigations of syncope may increasingly utilize implantable devices.