Clinical Significance of the induction of life-threatened arrhythmia for implantable cardioverter defibrillator implantation

抄録

From 1998 to 2004,180 patients were performed implantable cardioverter defibrillator implantation at a single center. Mean age was 67 and percent male waz 79%. Ischemic heart disease (IHD) was 59%, history of cardio-pulmonary arrest (CPA) was 40%. Severe reduced ejection fraction (LVEF below 30%) was 34%. Electro-physiological study (EPS) for the induction of ventricular arrhythmia was performed in 75% of all cases and of these,61% of cases resulted in positive study. Mean follow up period was 651 days and appropriate discharge (including anti-tachycardia pacing)occurred in 36 cases (20%). Positive EPS could not significantly predict appropriate discharge in both CPA group (32.3%/31.3%; posi/nega p=0.9984) and non-CPA group (20.4%/10.5%; posi/nega p=0.2082). And also in both IHD group (26.8%/21.9%; posi/nega p=0.6038) and non-IHD group (21.2%/9.5%; posi/nega p=0.2621). But in all patients, history of CPA could significantly predict appropriate discharge (27.9%/15.7%; p=0.0452). In conclusion, electro-physiological study might not be a major predictor for appropriate discharge after implantable cardioverter defibrillator implantation.