Abstract 16088: Radial Artery Free and T Graft Patency Over a 15 Year Period
Objectives: The radial artery is often utilized as the second arterial graft for coronary artery bypass grafting (CABG). Little is known about the differences in long term patency between radial free and T grafts.
Methods: Radial arteries were utilized as free grafts (originating from the aorta) or T grafts (originating from the LIMA) for CABG over a 15 year period. Patients were contacted by telephone or mailed survey to determine if postoperative cardiac cath was performed. Retrospective examination of cardiac cath reports and films by a surgeon was performed. Grafts were graded as patent, luminal irregularity, or occluded. Each sequential graft was counted separately.
Results: Between 9/1993 and 12/2008, 13,926 patients underwent isolated CABG and 3248 radial arteries were utilized as conduit. Cath data was available on 373 radial artery grafts (104 free and 269 T) in 216 patients (11% of radial artery grafts). Follow-up mean was 7.4 +/- 3.8 yrs. (postoperative catheterization range 3 days - 14.4 years). Kaplan Meier freedom from occlusion for radial free and T grafts at 1, 5, and 10 years was 93%, 85%, 71%, and 100%, 90%, 69%; respectively (p=0.91 free vs. T) (Figure).
Conclusions: In 216 patients with postoperative cardiac cath following CABG with a radial artery graft, radial free and T grafts had similar and acceptable long term patency to support their utilization as CABG conduit.
- © 2011 by American Heart Association, Inc.