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Apparent obstruction of the superior vena cava and a continuous murmur: signs of a fistula between a vein graft aneurysm and the right atrium

A previously undescribed complication of a saphenous vein aortocoronary bypass graft, namely formation of a fistula between a vein graft aneurysm and the right atrium is reported. A patient presented with a continuous murmur and a combination of signs suggesting superior vena cava obstruction. This pathology was shown by both echocardiography and angiography. Surgical treatment was attempted.