Among the outcomes examined , the highest absolute risk increase was for heart failure .
Associations between atrial fibrillation and included outcomes were broadly consistent across subgroups and in sensitivity analyses .
Atrial fibrillation is associated with an increased risk of death and an increased risk of cardiovascular and renal disease .
OBJECTIVE To quantify the association between  atrial fibrillation and cardiovascular disease , renal disease , and death .
Atrial fibrillation and risk of clinical events in chronic heart failure with and without left ventricular systolic dysfunction: results from the Candesartan in Heart failure-Assessment of Reduction in Mortality and morbidity (CHARM) program.
OBJECTIVES We assessed the risk of adverse cardiovascular ( CV ) outcomes associated with atrial fibrillation ( AF ) in the C and esartan in Heart failure- Assessment of Reduction in Mortality and morbidity ( CHARM ) program , which enrolled patients with chronic heart failure ( CHF ) and a broad range of ejection fractions ( EFs ) . BACKGROUND Atrial fibrillation is associated with an increased risk of adverse CV outcomes in patients with CHF and reduced EF . The risk of AF in patients with CHF and preserved left ventricular ejection fraction ( PEF ) is unknown . METHODS A total of 7,599 patients with symptomatic CHF were r and omized to c and esartan or placebo . Patients were divided by baseline EF ( < or = 40 % or > 40 % ) in low or preserved EF groups . Major outcomes were cardiovascular death or hospitalization for worsening heart failure , and all-cause mortality . Median follow-up was 37.7 months . RESULTS A total of 670 ( 17 % ) patients in the low EF group and 478 ( 19 % ) in the PEF group had AF at baseline . Atrial fibrillation predicted a high risk of cardiovascular morbidity and mortality regardless of baseline EF . Patients with AF and low EF had the highest absolute risk for adverse CV outcomes . However , AF was associated with greater relative increased risk of the major outcomes in patients with PEF than in patients with low EF : hazard ratio 1.72 ( 95 % confidence interval [ CI ] 1.45 to 2.06 ) versus 1.29 ( 95 % CI 1.14 to 1.46 ) , respectively . The same was true for the risk of all-cause mortality . C and esartan was associated with similar treatment effects regardless of baseline rhythm . CONCLUSIONS Atrial fibrillation is associated with an increased risk of CV outcomes in patients with CHF and either reduced EF or PEF . C and esartan improved outcomes similarly regardless of baseline rhythm
Among the outcomes examined , the highest absolute risk increase was for heart failure .
Associations between atrial fibrillation and included outcomes were broadly consistent across subgroups and in sensitivity analyses .
Atrial fibrillation is associated with an increased risk of death and an increased risk of cardiovascular and renal disease .
OBJECTIVE To quantify the association between  atrial fibrillation and cardiovascular disease , renal disease , and death .