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Diagnostic Test Accuracy of Exercise Testing in Detecting High-Risk Accessory Pathways in WPW: A Systematic Review

José Nunes de Alencar1,2, Fabio Mahamad Rassi1, Raquel Pereira Rios1

  • 1Instituto Dante Pazzanese de Cardiologia, São Paulo, SP - Brasil.

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Non-invasive exercise tests can help rule out high-risk accessory pathways in Wolff-Parkinson-White (WPW) syndrome, showing high sensitivity. However, these tests alone are insufficient for definitive risk stratification.

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Area of Science:

  • Cardiology
  • Electrophysiology
  • Medical Diagnostics

Background:

  • Wolff-Parkinson-White (WPW) syndrome involves ventricular pre-excitation, potentially causing dangerous arrhythmias.
  • Current non-invasive exercise tests have inconsistent accuracy in identifying high-risk accessory pathways.

Purpose of the Study:

  • To assess the diagnostic accuracy of non-invasive exercise tests versus invasive electrophysiological studies (EPS) for high-risk accessory pathways in WPW syndrome.

Main Methods:

  • A systematic literature search (PubMed, Scopus, Web of Science) followed PRISMA-DTA guidelines.
  • Meta-analysis of six studies (765 patients) using a bivariate random-effects model.
  • Evaluated sensitivity, specificity, and likelihood ratios with EPS as the gold standard.

Main Results:

  • Pooled sensitivity reached 92.7%, indicating strong detection of high-risk pathways.
  • Pooled specificity was 28.1%, suggesting limitations in confirming pathways.
  • A negative likelihood ratio (0.260) suggests a negative test significantly reduces the likelihood of a high-risk pathway.

Conclusions:

  • Non-invasive exercise tests offer valuable utility for excluding high-risk accessory pathways in WPW syndrome.
  • These tests should not be used as the sole basis for risk stratification.
  • Further research may refine the role of non-invasive testing in WPW management.