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Ablation compared with drug therapy for recurrent ventricular tachycardia in arrhythmogenic right ventricular cardiomyopathy: Results from a multicenter study.
Heart Rhythm : the Official Journal of the Heart Rhythm Society 2018 October 25
BACKGROUND: The comparative efficacy of antiarrhythmic drug (AAD) therapy vs ventricular tachycardia (VT) ablation in arrhythmogenic right ventricular cardiomyopathy (ARVC) is unknown.
OBJECTIVE: We compared outcomes of AAD and/or β-blocker (BB) therapy with those of VT ablation (with AAD/BB) in patients with ARVC who had recurrent VT.
METHODS: In a multicenter retrospective study, 110 patients with ARVC (mean age 38 ± 17 years; 83% men) with a minimum of 3 VT episodes were included; 77 (70%) were initially treated with AAD/BB and 32 (29%) underwent ablation. Subsequently, 43 of the 77 patients treated with AAD/BB alone also underwent ablation. Overall, 75 patients underwent ablation.
RESULTS: When comparing initial AAD/BB therapy (n = 77) and VT ablation (n = 32) after ≥3 VT episodes, a single ablation procedure rendered 35% of patients free of VT at 3 years compared with 28% of AAD/BB-only-treated patients (P = .46). Of the 77 AAD/BB-only-treated patients, 43 subsequently had ablation. For all 75 patients who had ablation, 56% were VT-free at 3 years after the last ablation procedure. Epicardial ablation was used in 53% and was associated with lower VT recurrence after the last ablation procedure (endocardial/epicardial vs endocardial-only; 71% vs 47% 3-year VT-free survival; P = .05). Importantly, there was no difference in survival free of death or transplantation between the ablation- and AAD/BB-only-treated patients (P = .61).
CONCLUSION: In patients with ARVC and a high VT burden, mortality and transplantation-free survival are not significantly different between drug- and ablation-treated patients. These patients have a high risk of recurrent VT despite drug therapy. Combined endocardial/epicardial ablation is associated with reduced VT recurrence as compared with endocardial-only ablation.
OBJECTIVE: We compared outcomes of AAD and/or β-blocker (BB) therapy with those of VT ablation (with AAD/BB) in patients with ARVC who had recurrent VT.
METHODS: In a multicenter retrospective study, 110 patients with ARVC (mean age 38 ± 17 years; 83% men) with a minimum of 3 VT episodes were included; 77 (70%) were initially treated with AAD/BB and 32 (29%) underwent ablation. Subsequently, 43 of the 77 patients treated with AAD/BB alone also underwent ablation. Overall, 75 patients underwent ablation.
RESULTS: When comparing initial AAD/BB therapy (n = 77) and VT ablation (n = 32) after ≥3 VT episodes, a single ablation procedure rendered 35% of patients free of VT at 3 years compared with 28% of AAD/BB-only-treated patients (P = .46). Of the 77 AAD/BB-only-treated patients, 43 subsequently had ablation. For all 75 patients who had ablation, 56% were VT-free at 3 years after the last ablation procedure. Epicardial ablation was used in 53% and was associated with lower VT recurrence after the last ablation procedure (endocardial/epicardial vs endocardial-only; 71% vs 47% 3-year VT-free survival; P = .05). Importantly, there was no difference in survival free of death or transplantation between the ablation- and AAD/BB-only-treated patients (P = .61).
CONCLUSION: In patients with ARVC and a high VT burden, mortality and transplantation-free survival are not significantly different between drug- and ablation-treated patients. These patients have a high risk of recurrent VT despite drug therapy. Combined endocardial/epicardial ablation is associated with reduced VT recurrence as compared with endocardial-only ablation.
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