Postpartum left circumflex to left atrial fistula: A rare presentation.

Coronary artery fistulas (CAFs) are rare and often asymptomatic, but severe complications can occur, resulting in heart failure and cardiac arrhythmia. They have been associated with iatrogenic or traumatic injuries as well as systemic inflammatory conditions. However, there have been very few documented cases of pregnancy associated CAFs. We observed a case of left circumflex to left atrium fistula in a 37-year-old female presenting with insidious onset of progressive dyspnea during pregnancy.