Influence of baseline inducibility and activation mapping on ablation outcomes in patients with structural heart disease and ventricular tachycardia

• Published in: Journal of cardiovascular electrophysiology 2021-05, Vol.32 (5), p.1328-1336
• Main Authors: Cano, Óscar, Pérez‐Roselló, Víctor, Ayala, Hebert D, Izquierdo, Maite, Osca, Joaquín, Sancho‐Tello, María José, Martínez‐Dolz, Luis
• Format: Article
• Language: English
• Subjects: Ablation; activation mapping; Cardiac arrhythmia; Cardiovascular disease; Congestive heart failure; Coronary artery disease; Heart; Heart transplantation; Mapping; Morphology; substrate mapping; Tachycardia; Ventricle; ventricular tachycardia
• ISSN: 1045-3873; 1540-8167
• DOI: 10.1111/jce.15035

Introduction Stand‐alone substrate ablation has become a standard ventricular tachycardia (VT) ablation strategy. We sought to evaluate the influence of baseline VT inducibility and activation mapping on ablation outcomes in patients with structural heart disease (SHD) undergoing VT ablation. Methods Single center, observational and retrospective study including consecutive patients with SHD and documented VT undergoing ablation. Baseline VT induction was attempted before ablation in all patients and VT activation mapping performed when possible. Ablation was guided by activation mapping for mappable VTs plus substrate ablation for all patients. Ablation outcomes and complications were evaluated. Results One hundred and sixty patients were included and were classified in three groups according to baseline VT inducibility:group 1 (non inducible, n = 18), group 2 (1 VT morphology induced, n = 53), and group 3 (>1 VT morphology induced, n = 89). VT activation mapping was possible in 35%. After a median follow‐up of 38.5 months, baseline inducibility of greater than 1 VT morphology was associated with a significant incidence of VT recurrence (42% for group 3 vs. 15.1% for group 2% and 5.6% for group 1, Log‐rank p