ArticleFrontiers in cardiovascular medicine2026
Index of cardiac electrophysiological balance in patients with vasovagal syncope confirmed by head-up tilt test.
Article in Frontiers in cardiovascular medicine, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: Vasovagal Syncope (VVS) is a transient loss of consciousness caused by reflex vasodilatation and/or bradycardia, typically triggered by orthostatic stress, emotion, or pain. It is the most common form of neurally mediated syncope, carries a benign prognosis, yet recurrent episodes impair quality of life and require risk stratification and tailored management. The Index of Cardiac Electrophysiological Balance (ICEB) is a novel index designed to quantify the ventricular depolarization-repolarization electrophysiological balance and exhibits a bidirectional relationship with autonomic nervous function. In this study, we investigated the changes in ICEB among patients with VVS. Methods: The clinical data of 266 patients with VVS, confirmed by Head-up tilt test (HUTT) at Shaanxi Provincial People's Hospital from August 2021 to February 2025 were retrospectively collected as study group. A total of 201 healthy individuals who completed routine physical examinations during the same period were enrolled as the control group. Electrocardiogram (ECG) parameters (RR, P, QRS, QT) and ICEB were calculated and statistical analyzed during the HUTT in 5-minute supine phase or at rest. Results: The QT interval, corrected QT (QTc) interval, ICEB and corrected ICEB (ICEBc) were lower ( Conclusion: In our study, we tried to demonstrate the relationship between ICEB and VVS confirmed by HUTT. We indicate that ICEB and ICEBc were shortened in patients with VVS at baseline, which may be attributed to autonomic dysfunction.
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