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Published on: November 24, 2014
Conduits for Coronary Bypass: Arteries Other Than the Internal Thoracic Artery's
1Division of Cardiothoracic Surgery, St. Louis University Hospital, USA.
Insights
The radial artery offers superior 10-year patency compared to saphenous vein for coronary artery bypass grafting. Endoscopic harvesting and pharmacological management mitigate drawbacks like incision length and spasm.
Area of Science:
- Cardiovascular Surgery
- Vascular Grafting
Background:
- Coronary artery bypass grafting (CABG) frequently utilizes venous grafts.
- Alternative arterial conduits are being explored to improve long-term graft patency.
Purpose of the Study:
- To review and compare the efficacy and safety of three alternative arterial conduits for CABG: radial artery, gastroepiploic artery, and inferior epigastric artery.
- To assess their patency rates and associated complications.
Main Methods:
- Review of accumulating clinical experience and patency data for radial artery, gastroepiploic artery, and inferior epigastric artery grafts.
- Comparison of outcomes against traditional saphenous vein grafts.
- Evaluation of techniques to mitigate drawbacks, such as endoscopic harvesting for radial artery and pharmacological management for spasm.
Main Results:
- Radial artery demonstrates superior 10-year patency compared to saphenous vein, with drawbacks of long incision and sensory disturbance addressed by endoscopic harvest and spasm management.
- Gastroepiploic artery shows favorable patency comparable to the radial artery, with minimal complications despite abdominal entry.
- Inferior epigastric artery use is limited, often requiring composite grafting, with supportive but scarce patency data.
Conclusions:
- Radial artery and gastroepiploic artery are viable, advantageous alternatives to saphenous vein grafts for CABG.
- Further data on inferior epigastric artery patency is needed, but its current use remains minimal.
- These three arterial conduits offer significant advantages and acceptance in modern CABG procedures.
Abstract:
This is the third in a series on coronary artery bypass which reviews three alternative arterial conduits. The radial artery has become the most widely used of the three and accumulating experience demonstrates better patency at 10 years versus saphenous vein. Drawbacks are a long incision on the forearm, the propensity for spasm and persistent sensory disturbance in about 10%. The first is answered by endoscopic harvest which may yield a shorter conduit but reduces sensory nerve injury. Spasm is managed pharmacologically and by less harvest trauma. The gastroepiploic artery is used in situ and free and although the abdominal cavity is entered complications are minimal and patency compares favorably with the radial artery. Use of the inferior epigastric artery remains minimal and its similar length often requires composite use but limited patency data are supportive. Other arteries have had rare use and this is unlikely to change because the three presented here have significant advantages and acceptance.
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