Yonsei Med J.  2004 Aug;45(4):635-642. 10.3349/ymj.2004.45.4.635.

The Impact of the Preoperative Severity of Target-Vessel Stenosis on the Short-Term Patency of Radial Artery Grafts

• Joung B
• Park S
• Choi D
• Choi BW
• Ko YG
• Yoo KJ
• Jang Y
• Chung NS
• Cho SY

• KMID: 721414
• DOI: http://doi.org/10.3349/ymj.2004.45.4.635

Abstract

The fate of a grafted radial artery remains unknown. The purpose of this study was to determine whether the preoperative severity of stenosis of the target vessel influence short-term patency of radial artery (RA) grafts used as coronary artery bypass conduits. In 54 patients who had coronary artery bypass grafting (CABG) with RA grafts, RA patency was determined with multi-slice computed tomography (MSCT) 1 year after CABG. These patients were divided into three groups on the basis of the percentage of the target vessel stenosis: mild (< 60%, n=17), moderate (60% to 79%, n=19), and severe (> or = 80%, n=18). MSCT was also performed 1 week later to exclude early occlusion of RA grafts. In 3 patients, the MSCT failed to adequately discriminate the status of the RA graft due to poor image resolution. The overall incidence of RA occlusion was 23.5% (12 of 51) at 1 year in the entire population. The mild stenosis, moderate stenosis and severe stenosis group showed an occlusion rate of 50% (8 of 16), 23.5% (4 of 17) and 0% (0 of 18), respectively. The severe stenosis group had significantly lower rate of RA graft occlusion compared to the mild stenosis group (p< 0.001) and moderate stenosis group (p< 0.05). No difference in occlusion between grafts used for the different coronary artery branches could be demonstrated. Preoperative severity of the target coronary artery significantly affected the short-term RA grafts patency. Correct indication is the key factor for short-term RA patency.

Keyword

Bypass; revascularization; radial artery; multi- slice computed tomography

MeSH Terms

Aged
Coronary Arteriosclerosis/pathology/*radiography/*surgery
Coronary Artery Bypass/*methods
Coronary Vessels/pathology
Female
Follow-Up Studies
Humans
Incidence
Male
Middle Aged
Postoperative Complications/epidemiology
Radial Artery/*transplantation
Severity of Illness Index
Tomography, X-Ray Computed
Vascular Patency