Original articleAdult cardiacLong-Term Patency of 1108 Radial Arterial-Coronary Angiograms Over 10 Years
Section snippets
Material and Methods
Institutional ethics approval was obtained to collect postoperative angiographic coronary conduit data (CREC Project 1997.004). Individual specific patient consent for postoperative coronary graft angiography was also obtained in every instance.
We studied 1108 consecutive postoperative RA conduit angiograms performed between January 1997 and June 2007 for possible postoperative cardiac symptoms. Symptoms included typical angina, atypical chest pain, new myocardial infarction, and unexplained
Overall RA Conduit Patency
Angiograms for 1108 RA conduits were studied. The mean interval from the initial operation to the postoperative RA angiogram was 48.3 ± 40 months (range 1 to 132 months). At 48 months postoperatively, 982 of the 1108 RA grafts had perfect patency (89%) and 126 grafts failed (stenosis ≥ 60%, string sign, total occlusion).
RA Conduit Patency: Influence of Territory Grafted
RA graft patency was best when the RA was grafted to the LAD (96%) and worst when grafted to the main right coronary artery (RCA) usually between the acute margin and the crux
Comment
It has been 15 years since the reintroduction of the RA as an additional arterial conduit to the LITA (and RITA), to circumvent the failure of SVG from intimal hyperplasia and atherosclerosis—especially in the 5- to 15-year time frame. Even in contemporary randomized trials, SVG patencies are lower than for arterial grafts [17, 18, 19]. Although the RA has been used with increasing frequency in CABG since 1993 with many reports and reviews on its use, RA patency reports have been mainly
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