Background. To overcome the problems of late vein graft atherosclerosis occlusion, and need of coronary reoperations, total arterial revascularization was adopted. In this study we compared the usage of proximal and distal parts of radial artery in CABG.Methods. A total of 56 patients who had isolated coronary artery bypass grafting between June and August 2005 were evaluated. They were divided into two groups; group A where proximal radial was used and group B where distal radial was used. Preoperative patient characteristics, operative and postoperative data were evaluated. Patients were followed up at six months to one year postoperatively. Assessment of the CCS class, ECG, echocardiography, thallium scintigraphy and coronary angiography were done. Results: Postoperative data were statistically significant in the core of mean Icu and hospital stay and use of inotropic support as well. Spasm of radial artery was also statistically significant where 5 patients out of 29 of the distal group (17.2%) showed postoperative spasm in comparison to 1 patient of the 27 patients of the proximal group (3.7%) with p value 0.0431. during the follow-up, the only statistically significant results was improvement of the CCS class of angina among patients in the proximal group when compared to patients in the distal group. There is no statistically significant difference between the two groups as regards the incidence of postoperative bleeding, wound complications, low cardiac output, arrhythmias and systemic complications. Intraoperatively, no statistically significant data were found concerning mean operative, bypass and ischemic time.Conclusion:Usage of radial artery in CABG is preferable, especially for its proximal segments than for its distal segments and mainly in hyperlipidemic patients.