PMID- 30273766 OWN - NLM STAT- MEDLINE DCOM- 20201009 LR - 20201009 IS - 1556-3871 (Electronic) IS - 1547-5271 (Linking) VI - 16 IP - 3 DP - 2019 Mar TI - Positive impact of pulmonary vein isolation on biventricular pacing in nonresponders to cardiac resynchronization therapy. PG - 416-423 LID - S1547-5271(18)31011-7 [pii] LID - 10.1016/j.hrthm.2018.09.028 [doi] AB - BACKGROUND: Cardiac resynchronization therapy (CRT) is less effective in patients with atrial fibrillation (AF) because of impaired ventricular CRT capture. OBJECTIVE: We investigated the effects of catheter ablation in patients with AF and previous nonresponse to CRT. METHODS: Consecutive patients with AF and CRT nonresponse who underwent catheter ablation for AF were analyzed. CRT nonresponse was defined as one of the following: (1) reduced biventricular capture <95% due to rapidly conducted AF, (2) <1 point improvement in New York Heart Association (NYHA) class after CRT implantation, or (3) insufficient increase in left ventricular ejection fraction (LVEF;