RT Journal Article SR Electronic T1 Torsades de pointes in Prinzmetal’s variant angina JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 494 OP 494 DO 10.1136/heart.88.5.494 VO 88 IS 5 A1 A Athanasiadis A1 U Sechtem YR 2002 UL http://heart.bmj.com/content/88/5/494.abstract AB