How does an Internal Mammary Artery (IMA) graft typically perform over time?

How does an Internal Mammary Artery (IMA) graft typically perform over time?

• A. Remains patent for shorter period.
• B. Remains patent for longer period of time.
• C. Is not used in CABG.
• D. Requires no surgical dissection.

Answer: (B)

Long-term durability is the hallmark of an Internal Mammary Artery graft. The IMA has arterial tissue properties that resist atherosclerosis, with a healthy endothelium and strong flow dynamics that adapt well to coronary circulation. Because of these factors, when used in CABG—most commonly as a graft to the LAD—it tends to stay patent for many years, with high patency at 10 years and beyond, far outperforming vein grafts. This superior longevity translates into better long-term outcomes and fewer repeat interventions. It does require surgical dissection to harvest, so the idea that it needs no dissection isn’t accurate.

Long-term durability is the hallmark of an Internal Mammary Artery graft. The IMA has arterial tissue properties that resist atherosclerosis, with a healthy endothelium and strong flow dynamics that adapt well to coronary circulation. Because of these factors, when used in CABG—most commonly as a graft to the LAD—it tends to stay patent for many years, with high patency at 10 years and beyond, far outperforming vein grafts. This superior longevity translates into better long-term outcomes and fewer repeat interventions. It does require surgical dissection to harvest, so the idea that it needs no dissection isn’t accurate.