PT - JOURNAL ARTICLE AU - T Raina AU - J Gunn TI - The “butterfly” sign of the undilatable lesion AID - 10.1136/hrt.2005.071621 DP - 2006 Mar 01 TA - Heart PG - 404--404 VI - 92 IP - 3 4099 - http://heart.bmj.com/content/92/3/404.short 4100 - http://heart.bmj.com/content/92/3/404.full SO - Heart2006 Mar 01; 92