Publikationsansicht

ABSTRACTS (2009)

Abstract
Introduction: Scar-related ventricular tachycardia (VT) is often unmappable. Data regarding the outcomes of ablation for mappable vs unmappable VT are lacking. Methods: Catheter ablation of scar-related VT was performed in 70 consecutive patients (mean age 62±15 y). Clinical and procedure data were retrospectively analyzed. Outcomes of ablation of unmappable VTs were determined and compared to mappable VTs. Results: Ninety-five ablation procedures were performed. Ischemic heart disease, arrhythmogenic right ventricular cardiomyopathy and dilated cardiomyopathy were the major underlying substrates. Procedures were classified into Mappable (M, n=45) with only mappable VTs induced, and Unmappable (U, n=50) in which any unmappable VT was induced. U cases had longer procedure and fluoroscopy times and were associated with longer RF delivery times. The clinical VT was acutely successfully ablated in 73% of the M group vs. 92% in the U group, p=0.026 (Table). On Kaplan-Meier analysis, no significant differences were observed in complications, recurrences or mortality. On follow-up, only 25% of patients were on anti-arrhythmic drugs (AAD) with amiodarone being used in 11% of patients. Five patients (7%) were lost to followup. Table 1 M Procedures (n=45)U procedures (n=50)p-valueNumber of inducible SMVTs1.9±1.32.5±20.09RF energy duration (s)652±553955±5770.012Procedure time (min)267±81312±890.015Fluoroscopy time (min)32±1440±150.011Successful ablation of the clinical VT73%92%0.026In-hospital recurrences9%12%NSLate recurrences11%18%NSTime to recurrence (months)14±821±19NSFollow-up duration (months)28±1728±17NS Conclusions: Unmappable VT ablation is associated with longer procedure and fluoroscopy time and higher acute success compared to mappable VT ablation. Differences were not observed in complications and long term outcomes even with a low rate of AAD use.

Details der Publikation
Download http://europace.oxfordjournals.org/cgi/content/short/11/suppl_2/NP
http://dx.doi.org/10.1093/europace/eup171
Herausgeber Oxford University Press
Archiv HighWire Press OAI Repository (United States)
Keywords ABSTRACTS
Typ TEXT
Sprache Englisch