RT Journal Article SR Electronic T1 Unusual fluoroscopic finding during atrial fibrillation cryoablation JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 727 OP 732 DO 10.1136/heartjnl-2018-314225 VO 105 IS 9 A1 Gordon Andrew Begg A1 Muzahir Hassan Tayebjee YR 2019 UL http://heart.bmj.com/content/105/9/727.abstract AB