RT Journal Article SR Electronic T1 Left atrial appendage occlusion in high-risk patients: doing it is better than nothing JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 625 OP 625 DO 10.1136/heartjnl-2017-312785 VO 104 IS 7 A1 Vincenzo Vizzi A1 Maurizio Di Biasi A1 Giuseppe Alessandrino A1 Alessandro Colombo A1 Paolo Danna A1 Maurizio Viecca YR 2018 UL http://heart.bmj.com/content/104/7/625.abstract AB