Why the study?
The diagnostic value of non-invasive exercise tests in detecting high-risk accessory pathways in Wolff-Parkinson-White syndrome remains inconsistent in the literature.
Does non-invasive exercise testing accurately identify high-risk accessory pathways compared to invasive electrophysiological studies in patients with Wolff-Parkinson-White syndrome?
Does non-invasive exercise testing accurately identify high-risk accessory pathways compared to invasive electrophysiological studies in patients with Wolff-Parkinson-White syndrome?
Non-invasive exercise testing has high sensitivity (92.7%) but low specificity (28.1%) for detecting high-risk accessory pathways in WPW syndrome, making it useful for ruling out high-risk pathways but insufficient as a standalone risk stratification tool.
Supports ruling out high-risk pathways in WPW with negative exercise test; extends pooled diagnostic accuracy data from 46 studies.
Background Wolff-Parkinson-White (WPW) syndrome is characterized by ventricular pre-excitation, which can lead to severe arrhythmic events such as supraventricular tachycardia and pre-excited atrial fibrillation. The diagnostic value of non-invasive exercise tests in detecting high-risk accessory pathways remains inconsistent in the literature. Objectives To evaluate the diagnostic accuracy of non-invasive exercise tests compared to invasive electrophysiological studies (EPS) for identifying high-risk accessory pathways in WPW syndrome. Methods Following PRISMA-DTA guidelines, a comprehensive search was conducted in PubMed, Scopus, and Web of Science databases. Eligible studies assessed the sensitivity, specificity, and likelihood ratios of non-invasive exercise tests in WPW patients, using EPS as the reference standard. A bivariate random-effects model was applied for meta-analysis. Results Six studies, comprising a total of 765 patients, met the inclusion criteria. The pooled sensitivity was 92.7% (95% CI: 88.0% – 94.0%), while the pooled specificity was 28.1% (95% CI: 23% – 35.1%). A negative likelihood ratio (LR-) of 0.260 (95% CI: 0.174 – 0.387) indicated that the presence of a high-risk accessory pathway is about four times less likely after a negative test result. Sensitivity analysis restricted to pediatric patients showed consistent results. Conclusion Non-invasive exercise tests demonstrate a reasonable diagnostic utility for ruling out high-risk pathways in WPW syndrome. However, caution is advised when using these tests as standalone criteria for risk stratification.
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Alencar et al. (2025) studied this question.
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