Fig. 13

Axial CT images from a patient with coronary artery to pulmonary artery fistula, which results in partial opacification of the main pulmonary artery while contrast is maximally opacifying the aorta, seen on axial CTA (a, b) and conventional angiography (c). On conventional angiography, the fistula is seen opacifying on the arterial phase (arrow). The result is a systemic to pulmonary artery shunt. Notice the large thrombus in the A-V malformation abutting the main pulmonary artery