Endo-epicardial homogenization of the scar versus limited substrate ablation for the treatment of electrical storms in patients with ischemic cardiomyopathy.

Abstract:

OBJECTIVES:This study investigated the impact on recurrences of 2 different substrate approaches for the treatment of these arrhythmias. BACKGROUND:Catheter ablation of electrical storms (ES) for ventricular arrhythmias (VAs) has shown moderate long-term efficacy in patients with ischemic cardiomyopathy. METHODS:Ninety-two consecutive patients (81% male, age 62 ± 13 years) with ischemic cardiomyopathy and ES underwent catheter ablation. Patients were treated either by confining the radiofrequency lesions to the endocardial surface with limited substrate ablation (Group 1, n = 49) or underwent endocardial and epicardial ablation of abnormal potentials within the scar (homogenization of the scar, Group 2, n = 43). Epicardial access was obtained in all Group 2 patients, whereas epicardial ablation was performed in 33% (14) of these patients. RESULTS:Mean ejection fraction was 27 ± 5. During a mean follow-up of 25 ± 10 months, the VAs recurrence rate of any ventricular tachycardia (VTs) was 47% (23 of 49 patients) in Group 1 and 19% (8 of 43 patients) in Group 2 (log-rank p = 0.006). One patient in Group 1 and 1 patient in Group 2 died at follow-up for noncardiac reasons. CONCLUSIONS:Our study demonstrates that ablation using endo-epicardial homogenization of the scar significantly increases freedom from VAs in ischemic cardiomyopathy patients.

journal_name

J Am Coll Cardiol

authors

Di Biase L,Santangeli P,Burkhardt DJ,Bai R,Mohanty P,Carbucicchio C,Dello Russo A,Casella M,Mohanty S,Pump A,Hongo R,Beheiry S,Pelargonio G,Santarelli P,Zucchetti M,Horton R,Sanchez JE,Elayi CS,Lakkireddy D,Tondo C

doi

10.1016/j.jacc.2012.03.044

subject

Has Abstract

pub_date

2012-07-10 00:00:00

pages

132-41

issue

2

eissn

0735-1097

issn

1558-3597

pii

S0735-1097(12)01421-0

journal_volume

60

pub_type

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