QRS duration and mortality in XXXX with @entity712 .

@entity1 @entity2643 @entity712 @entity296 @entity714 @entity944 @entity63
BACKGROUND AND OBJECTIVES: It has been suggested that prolongation of the QRS duration (>120 ms) is an independent risk factor for mortality in @entity1 with @entity296 . The purpose of this study was to examine the association between QRS duration and survival in @entity1 with @entity712 . METHODS: We performed a retrospective analysis to examine the association between QRS prolongation (> or =120 ms) and mortality. The study population included 669 @entity1 with @entity712 . Two groups, on the basis of baseline QRS duration <120 milliseconds or > or =120 milliseconds, were identified. The groups were compared with respect to total mortality and @entity944 . Subgroups were also stratified by @entity714 and @entity714 , ejection fraction (EF) <30% and > or =30% to 40%, @entity63 and @entity296 , @entity2643 and placebo. RESULTS: Prolonged QRS was associated with a significant increase in mortality (49.3% vs 34.0%, P =.0001) and @entity944 (24.8% vs 17.4%, P =.0004). @entity714 was associated with worse survival (P =.006) but not @entity944 . In @entity1 with an EF <30%, QRS prolongation continued to be associated with a significant increase in mortality (51.6% vs 41.1%, P =.01) and @entity944 (28.8% vs 21.1%, P =.02). In those with an EF of 30% to 40%, QRS prolongation was associated with a significant increase in mortality (42.7% vs 23.3%, P =.0036) but not in @entity944 (13.3% vs 12.0%, P =.625). After adjustment for baseline variables, independent predictors of mortality were found to be prolongation of QRS (P =.0028, risk ratio 1.46) and depressed EF (P =.0001, risk ratio 0.965). Age, type of @entity296 , and drug treatment group were not predictive of mortality. CONCLUSION: QRS prolongation is an independent predictor of both increased total mortality and @entity944 in @entity1 with @entity712 .
