Using bilateral radial arteries in coronary artery bypass grafting is safe

Background Recent studies have revealed that radial artery grafts have excellent patency rates. However, harvesting of the radial artery is generally limited to the non-dominant forearm. We would like to demonstrate the effectiveness and safety of bilateral radial artery harvesting. Methods We enrolled 173 patients undergoing coronary artery bypass. Bilateral RA were used in 64 cases and unilateral in 109. The primary endpoint was post-harvest forearm and hand complications. Results Forearm and hand complications occurred immediately postoperatively in 28.1% of the bilateral radial artery group, significantly more than in the unilateral radial artery group (8.3%). During follow-up, no overall difference was found in post-harvest forearm and hand complications. However, the forearm and hand perception score in the bilateral radial artery group was higher: 8.78 ± 1.45 vs. 8.35 ± 0.84 in the unilateral radial artery group. Subgroup analysis in the bilateral radial artery group revealed no significant difference in forearm and hand perception score between the dominant and non-dominant donor forearms (8.78 ± 1.45 in non-dominant and 8.66 ± 1.00 in dominant forearms). The bilateral radial artery group had more arterial coronary anastomoses, longer operative times, and longer cardiopulmonary bypass times. However, a backward multiple linear regression model revealed that only two factors related to operative time, these were the number of arterial distal coronary anastomosis and cardiopulmonary bypass time. Conclusions This study demonstrated that bilateral radial artery conduits can be used effectively and safely with no difference in persistent complications related to the hands and forearms.