RT Journal Article SR Electronic T1 Clinical, echocardiographic, and operative findings in active infective endocarditis. JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 529 OP 537 DO 10.1136/hrt.48.6.529 VO 48 IS 6 A1 T H Pringle A1 S M Webb A1 M M Khan A1 H O O'Kane A1 J Cleland A1 A A Adgey YR 1982 UL http://heart.bmj.com/content/48/6/529.abstract AB