Academy of Medical Sciences of I.R. Iran Archives of Iranian Medicine 1029-2977 15 2 2012 02 01 Huge Arteriovenous Fistula between a Giant Aneurismal Right Coronary Artery and Coronary Sinus 113 114 EN Alireza Alizadeh Ghavidel Madjid Kiavar Zahra Odjaghi Yalda Mirmesdagh Journal Article Coronary arteriovenous fistulas are rare and may be congenital, traumatic, or iatrogenic. We report one of these rare congenital anomalies with a giant aneurismal right coronary artery (RCA) in a middle-aged lady who was asymptomatic for a long time.