RT Journal Article SR Electronic T1 The Authors’ reply: instantaneous pressure-flow relationships in aortic stenosis JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 1778 OP 1779 DO 10.1136/heartjnl-2020-317935 VO 106 IS 22 A1 Rong Bing A1 Haotian Gu A1 David E Newby A1 Phil Chowienczyk A1 Marc Richard Dweck YR 2020 UL http://heart.bmj.com/content/106/22/1778.2.abstract AB