ArticleClinical research in cardiology : official journal of the German Cardiac Society2026
Ventricular arrhythmia inducibility predicts clinical events in mitral valve prolapse syndrome.
Article in Clinical research in cardiology : official journal of the German Cardiac Society, 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
backgroundMitral valve prolapse (MVP) is commonly benign, but an arrhythmic phenotype (AMVP) with increased risk for sudden cardiac death has been described. Current risk stratification is mainly based on clinical data and imaging markers, while the role of programmed ventricular stimulation (PVS) remains uncertain.
methodsIn this prospective single-center cohort study, 42 patients fulfilling the EHRA consensus criteria for AMVP underwent an electrophysiological study with programmed ventricular stimulation between 2016 and 2025. Stimulation was performed from the right ventricular apex and outflow tract using up to two extra stimuli. Following shared decision-making, patients received either an implantable cardioverter-defibrillator (ICD) or an implantable loop recorder (ILR). The endpoint was the occurrence of clinically significant ventricular arrhythmias (VAs), defined as appropriate ICD therapies, ILR-documented sustained VT, or arrhythmic syncope.
resultsSustained ventricular arrhythmias were inducible in 20 patients (47.6%). ICD implantation was performed in 14 patients (70%) with inducible VA and in 6 patients (27.3%) without VA inducibility. During a mean follow-up of 38.0 ± 24.6 months, clinically significant VA occurred in 45.0% of patients with inducible VA vs. 9.1% of patients with nonpathological PVS (p = 0.01).
conclusionInducible ventricular arrhythmias during PVS were associated with subsequent clinically significant VA in AMVP. PVS may serve as an additional risk stratification tool in this entity.
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