Irrigated Radiofrequency Catheter Ablation Guided by Electroanatomic Mapping for Recurrent Ventricular Tachycardia After Myocardial Infarction The Multicenter Thermocool Ventricular Tachycardia Ablation Trial

摘要: Background— Recurrent ventricular tachycardia (VT) is an important cause of mortality and morbidity late after myocardial infarction. With frequent use implantable cardioverter-defibrillators, these VTs are often poorly defined not tolerated for mapping, factors previously viewed as relative contraindications to ablation. This observational multicenter study assessed the outcome VT ablation with a saline-irrigated catheter combined electroanatomic mapping system. Methods Results— Two hundred thirty-one patients (median LV ejection fraction, 0.25; heart failure in 62%) recurrent episodes monomorphic (median, 11 preceding 6 months) caused by prior infarction were enrolled. All inducible rate approximating or slower than any spontaneous targeted guided during sinus rhythm and/or VT. Patients excluded multiple 3 per patient) unmappable (present 69% pa...