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A Posterior Wall Resistant to Electroporation Finally Blocked With Vein of Marshall Ethanol Infusion

电穿孔 静脉 乙醇 麻醉 解剖 医学 内科学 化学 生物化学 基因
作者
Ciro Ascione,Christopher Kowalewski,Thomas Pambrun,Nicolas Derval,Pierre Jaïs
出处
期刊:JACC: Clinical Electrophysiology [Elsevier BV]
卷期号:9 (5): 729-732
标识
DOI:10.1016/j.jacep.2022.12.018
摘要

The clinical relevance and prognostic implications of ventricular parasystole are unknown.This study sought to assess the prevalence of ventricular parasystole in patients with implantable cardioverter-defibrillators (ICDs) and ventricular parasystole’s association with ventricular arrhythmias and conduction system abnormalities.This study retrospectively evaluated patients who underwent ICD interrogation at a single center between June 1, 2019, and August 31, 2020, and reviewed all available ICD and electrocardiogram data. This study identified patients with ventricular parasystole and compared the prevalence of ventricular fibrillation (VF), ventricular tachycardia (VT), and new conduction system abnormalities in those with ≥5 years of intrinsic QRS-complex electrocardiograms to those without parasystole.This study included 374 patients (age 57 ± 21 years, 72% male, 45% nonischemic, 32% ischemic cardiomyopathy), of which, 104 (28%) had VT only, 39 (10%) VF only, and 10 (3%) both VT/VF. Ventricular parasystole was identified in 33 patients (9%); parasystolic foci were predominantly from the His-Purkinje system. Compared with those without parasystole, patients with parasystole had a significantly higher rate of VF (36% vs 11%; P < 0.01), but not VT (42% vs 29%; P = 0.12). Patients with parasystole, compared with those without parasystole, had a higher prevalence of new conduction abnormalities, particularly progressive intraventricular conduction delay (11 of 18 [61%] vs 12 of 83 [14%]; P < 0.01) and new right bundle branch block (4 of 18 [22%] vs 1 of 83 [1%]; P < 0.01).Ventricular parasystole was strongly associated with new conduction system abnormalities and VF in patients who have cardiomyopathy with ICDs, suggesting a potential link between VF and His-Purkinje damage in this patient population.
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