RT Journal Article SR Electronic T1 Tricuspid component of first heart sound. JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 1275 OP 1279 DO 10.1136/hrt.35.12.1275 VO 35 IS 12 A1 Lakier, J B A1 Bloom, K R A1 Pocock, W A A1 Barlow, J B YR 1973 UL http://heart.bmj.com/content/35/12/1275.abstract AB