Final answer:
The best description for the procedure described is Two aortocoronary grafts and one mammary-coronary graft. Aortocoronary grafts involve using a blood vessel to bypass an occluded coronary artery, and the mammary-coronary graft involves using the mammary artery for the bypass. The patient underwent two aortocoronary grafts using the saphenous vein and one mammary-coronary graft.
Step-by-step explanation:
The best description for the procedure described is Two aortocoronary grafts and one mammary-coronary graft.
A saphenous bypass graft is a type of aortocoronary graft, which is a graft that uses a blood vessel from outside the heart to bypass the occluded area of a coronary artery. In this case, the patient underwent two aortocoronary grafts using the saphenous vein from the aorta to the left anterior descending branch of the left main coronary artery and the left posterior descending branch of the left main coronary artery.
In addition, the patient underwent a mammary-coronary graft, which involves using the mammary artery to bypass an occluded coronary artery. In this case, the mammary artery was repositioned to the right coronary artery.