The Use of Radial Artery for CABG: An Update

Area of Science:

• Cardiovascular Surgery
• Vascular Grafting
• Cardiac Surgery Research

Background:

• The radial artery has been utilized as a secondary conduit for coronary artery bypass grafting (CABG) since 1971.
• Previous clinical studies on radial artery grafts were underpowered, leading to inconclusive outcome data.
• With nearly 50 years of experience, a comprehensive review is needed to establish its optimal role.

Purpose of the Study:

• To review existing literature and define the best alternative conduit for CABG after the left internal thoracic artery.
• To evaluate the efficacy and safety of the radial artery as a secondary or tertiary conduit in CABG.
• To compare radial artery graft outcomes with other available conduits, particularly saphenous vein grafts.

Main Methods:

• A thorough literature review was conducted, focusing on randomized controlled trials, propensity-matched observational studies, and meta-analyses.
• Data from a large patient population receiving arterial conduits and saphenous vein grafts were analyzed.
• Studies comparing clinical outcomes and graft patency rates were prioritized.

Main Results:

• The radial artery demonstrates safety and effectiveness as a secondary CABG conduit.
• Graft patency and clinical outcomes are superior when using the radial artery compared to saphenous vein grafts.
• The radial artery is also effective as a third conduit, particularly for the right coronary artery territory.

Conclusions:

• The radial artery is a safe and effective alternative conduit for coronary artery bypass grafting.
• Radial artery grafts offer superior patency and outcomes compared to saphenous vein grafts.
• The aorto-to-coronary radial artery bypass graft is the conduit of choice following the left internal thoracic artery graft in CABG procedures.