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Funding Acknowledgements none OnBehalf none Coronary arteriovenous fistula (CAF) is a rare usually congenital defect that occurs in 0.1-0.2% of patients undergoing coronary angiography. A left-to-right shunt exists in more than 90% cases. In approximately 20% of patients CAF is accompanied with coronary artery aneurysm (CAA). We describe a case of 65-years-old woman with history of murmur from childhood, who presents with symptoms of slowly worsening dyspnea on exertion and strong pericardial pain. A suspicion for CAF was made from echocardiography and finally confirmed by other diagnostic modalities (coronary angiography and computed tomography with 3D reconstructions). We have diagnosed a complex case of a giant CAA involving left main and a periphery of left circumflex artery, accompanied with CAF terminating in the right atrium, responsible for a significant left-to-right shunt and coronary steal phenomenon. Patient was successfully treated by surgical ligation of the distal part of CAF in the right atrium. There were no signs of an acute myocardial ischemia on beating heart (ECG, perioperative echocardiography) when CAF was temporary occluded by tourniquet and so definitive surgical ligation of CAF was performed back on cardiopulmonary bypass. The postoperative course was uneventful without complications and the patient was discharged 6 days after surgery. One year after surgery patient is doing well with no complaints. Control echocardiography showed a regression of left and right ventricle volume overload. Coronary angiography showed normal perfusion in the left coronary artery territory, and no more visible collaterals flow right coronary artery. Abstract P258 Figure. complex coronary artery aneurysm

european heart journal. cardiovascular imaging

P258 Giant coronary arteriovenous fistula with significant left-to-right shunt in symptomatic patient - a multimodal diagnostic approach and successful surgical treatment