Transcutaneous closure of a huge multilocular coronary to right atrium fistula causing severe right side heart failure: A case report

Coronary artery fistula (CAF) is a congenital connection between a coronary artery and cardiac chambers, or a vessel bypassing a capillary system. The clinical presentation of congenital CAF varies, depending on its size and the draining chamber. A 40-year-old female presented with right-sided heart failure and was diagnosed by transthoracic echocardiography and computed tomography with 3D printing to have substantial coronary to right atrium fistula. Left main artery was cannulated to the outlet of the fistula at the base of the superior vena cava to the right atrium. The wire snared and created the arterio-venous loop. A 7F delivery sheath through the arterio-venous loop landed in proximal left circumflex part of the fistula, Amplatzer duct occluder I size 12/10 selected with the distal (aortic) skirt positioned distal to the most distal visible coronary branch. We waited for 10 min monitoring the ST segments for any changes. Finally, the device was released with complete closure of the fistula sparing all coronary branches. Follow-up transthoracic echocardiography after six months showed no flow to fistula sacs; the patient's symptoms improved dramatically. In conclusion, transcatheter closure of an isolated enormous multiloculated CAF is feasible and relatively safe. Surgery should be reserved for CAF with failed percutaneous closure.