RT Journal Article SR Electronic T1 Does atrial fibrillation preclude biventricular pacing? JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 826 OP 827 DO 10.1136/hrt.2007.133769 VO 94 IS 7 A1 Jeffrey W H Fung A1 Gabriel W K Yip A1 Cheuk-Man Yu YR 2008 UL http://heart.bmj.com/content/94/7/826.abstract AB