Multivariate analysis showed that current smokers had a significantly higher risk of first ventricular tachycardia/ventricular fibrillation or death ( hazard ratio [ HR ] 1.51 ; 95 % confidence interval [ CI ] 1.14-2 .01 ; P = .005 ) and a higher risk for first ventricular tachycardia/ventricular fibrillation episode ( HR 1.54 , 95 % CI 1.12-2 .13 , P = .008 ) than did nonsmokers .