RT Journal Article SR Electronic T1 CARDIAC OUTPUT IN A CASE OF PERICARDIAL EFFUSION JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 143 OP 146 DO 10.1136/hrt.7.3.143 VO 7 IS 3 A1 C. M. Fletcher YR 1945 UL http://heart.bmj.com/content/7/3/143.abstract AB