Multivariate analysis showed that current smokers had a significantly higher risk of first ventricular tachycardia/ventricular fibrillation or death ( hazard ratio -LSB- HR -RSB- @ ; @ % confidence interval -LSB- CI -RSB- @-@ @ ; P = @ ) and a higher risk for first ventricular tachycardia/ventricular fibrillation episode ( HR @ , @ % CI @-@ @ , P = @ ) than did nonsmokers .