By univariate and multivariate analysis, we find relationship between vascular complications and factors such as: cardiovascular risk factors, difference in radial artery diameter and sheath size, factors concerning with procedure: radial artery diameter before procedure and BMI were also related to diffuse stenosis in late term after procedure. Conclusion: Ultrasonic evaluation of the radial artery was useful in selecting both an access route and appropriate size of the sheath to determine early and late vascular complications.