The addition of CABG therapy tended to reduce cardiovascular deaths ( hazard ratio [ HR ] : 0.83 ; 95 % confidence interval [ CI ] : 0.68 to 1.03 ; p = 0.09 ) and significantly reduced the most common modes of death : sudden death ( HR : 0.73 ; 95 % CI : 0.54 to 0.99 ; p = 0.041 ) and fatal pump failure events ( HR : 0.64 ; 95 % CI : 0.41 to 1.00 ; p = 0.05 ) .