Prospective evaluation of outcome of Indian patients who meet MADIT II (Multicenter Automatic Defibrillator Implantation Trial) criteria for implantable cardioverter defibrillator implantation: is it appropriate for Indian patients?

Abstract

BackgroundThe MADIT II investigators had concluded that prophylactic use of an ICD improved survival in patients with prior myocardial infarction reduced left ventricular ejection fraction. Whether MADIT II criteria for ICD implantation are appropriate for Indian patients also is unclear and not studied. MethodsA total of 144 patients, Mean age 56.23 ± 10.9 years who met MADIT II criteria were prospectively followed for 20.78 + 5.9 months. ResultsDuring the follow-up period, 26 (18.1%) patients died. 18 were sudden cardiac deaths and 8 were non SCD deaths. Total mortality did not correlate with Age, NYHA class, NSVT on Holter, PVC >10/hours, QRS width, or use of statins. Multivariate logistic regression model identified the following variables associated with increase all-cause mortality: No use of beta blocker (odd ratio:13.068, p = 0.021), No past revascularization (odd ratio:11.613,p = 0.007) and Increase serum creatinine level (odd ratio: 4.066, p = 0.035). The mortality rate in the present series was comparable with that in the MADIT II conventional therapy group though patient in present study are younger, less diabetic, hypertensive, smokers and better treated with beta-blockers, ACE/ARB and statin. ConclusionIndian patients with prior MI (more than one month back) and left ventricular ejection fraction of 30% or less had a cardiac mortality similar to western population who are not treated with prophylactic ICD. Patients of Indian origin should derive a similar benefit with prophylactic implantation of ICD as per MADIT II criteria as would a western population.