RT Journal Article SR Electronic T1 Aortic valve cusp prolapse before and after valve-sparing aortic root replacement JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 8 OP 9 DO 10.1136/heartjnl-2022-321390 VO 109 IS 1 A1 Marek A Deja YR 2023 UL http://heart.bmj.com/content/109/1/8.abstract AB