Figure 2.

(A) Kaplan–Meier curves for the secondary composite outcome of first occurrence of all-cause mortality or HF hospitalization according to the baseline rhythm (SR and atrial fibrillation or flutter) in the total patient cohort. (B) Kaplan–Meier curves for the secondary composite outcome of first occurrence of all-cause mortality or HF hospitalization in CRT-D patients by baseline rhythm (atrial fibrillation or flutter vs. SR). AF, atrial fibrillation or flutter; aHR, adjusted hazard ratio; CI, confidence interval; CRT-D, cardiac resynchronization therapy with defibrillator; ICD, implantable cardioverter defibrillator; SR, sinus rhythm.