RT Journal Article SR Electronic T1 Needle injury to the heart. JF Archives of Emergency Medicine JO Arch Emerg Med FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 54 OP 57 DO 10.1136/emj.9.1.54 VO 9 IS 1 A1 Morrison, W G A1 Heyworth, J R YR 1992 UL http://emj.bmj.com/content/9/1/54.abstract AB