From: Low prevalence of significant carotid artery disease in Iranian patients undergoing elective coronary artery bypass
Grade of stenosis
Normal
< 50%
50 – 69%
70 %- near occlusion
occlusion
Right common carotid artery
258
13
-
Left common carotid artery
251
20
Right Internal carotid artery
154
113
2
Left Internal carotid artery
157
112
1