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Related Experiment Videos

The electrocardiogram in patients with multiple accessory atrioventricular pathways.

H J Wellens1, J Atié, J L Smeets

  • 1Department of Cardiology, Academic Hospital Maastricht, University of Limburg, The Netherlands.

Journal of the American College of Cardiology
|September 1, 1990
PubMed
Summary

Electrocardiogram (ECG) findings can suggest multiple accessory pathways in patients with supraventricular tachycardia. Further prospective studies are needed to confirm the diagnostic value of ECG in identifying these complex cardiac conditions.

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Area of Science:

  • Cardiology
  • Electrophysiology
  • Medical Diagnostics

Background:

  • Accessory pathways can lead to supraventricular tachycardias.
  • Identifying multiple accessory pathways is crucial for effective treatment planning.
  • The role of the 12-lead electrocardiogram (ECG) in diagnosing multiple accessory pathways requires further investigation.

Purpose of the Study:

  • To review 12-lead ECG findings in patients with documented multiple accessory pathways.
  • To identify specific ECG patterns suggestive of more than one atrioventricular (AV) pathway.
  • To assess the potential diagnostic utility of ECG in predicting multiple accessory pathways.

Main Methods:

  • Retrospective analysis of ECGs from 17 patients with confirmed multiple accessory pathways (electrophysiology study and/or intraoperative mapping).

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  • Evaluation of specific ECG criteria including P wave configuration, conduction patterns, and pre-excitation during various tachyarrhythmias.
  • Assessment of changes in ECG patterns related to drug administration and spontaneous tachycardia variations.

    • Main Results:

    • Twelve out of 17 patients exhibited ECG findings suggestive of more than one AV pathway.
    • Key indicators included varied P wave configurations, mismatched pathway locations, multiple pre-excitation patterns during atrial fibrillation, and spontaneous or drug-induced changes in tachycardia type or pre-excitation.
    • Specific findings were observed in subsets of patients, highlighting diverse presentations of multiple accessory pathways on ECG.

    Conclusions:

    • Certain 12-lead ECG findings may indicate the presence of multiple accessory pathways.
    • The retrospective nature of this study limits definitive conclusions on the ECG's predictive value.
    • Prospective studies are essential to validate the diagnostic accuracy of ECG for identifying multiple accessory pathways.