TY - JOUR T1 - Aortic dissection: an <em>x</em> ray sign JF - Emergency Medicine Journal JO - Emerg Med J SP - 310 LP - 310 DO - 10.1136/emj.2006.037010 VL - 24 IS - 4 AU - S Gartland AU - D Sookur AU - H Lee Y1 - 2007/04/01 UR - http://emj.bmj.com/content/24/4/310.1.abstract N2 - A 55-year-old man, with a history of hypertension and smoking, presented with severe acute onset central chest pain, radiating through to the back and down to the … ER -