TY - JOUR T1 - Images in cardiology. The "butterfly" sign of the undilatable lesion. JO - Heart PY - 2006/03/01 AU - Raina T AU - Gunn J ED - DO - DOI: 10.1136/hrt.2005.071621 VL - 92 IS - 3 SP - 404 Y2 - 2024/12/22 ER -