The primary composite end point-all-cause death or hospitalization-was reduced only in patients randomized to exercise training without a device ( hazard ratio -LSB- HR -RSB- @ , @ % confidence interval -LSB- CI -RSB- @-@ @ -LSB- P = @ -RSB- ; RV lead : HR @ , @ % CI @-@ @ -LSB- P = @ -RSB- ; BiV pacing : HR @ , @ % CI @-@ @ -LSB- P = @ -RSB- ; interaction P = @ ) .