 Left common carotid artery originates from the proximal brachiocephalic trunk. There is atherosclerotic plaque at the right carotid bifurcation with 70% stenosis of the internal carotid artery origin. There is also atherosclerotic plaque at the left internal carotid artery origin with 40-50% stenosis. There also appears to be stenosis of the right external carotid artery origin. The remainder of the common carotid arteries and cervical internal carotid arteries are normal in course and caliber. Both vertebral arteries are patent.
70% stenosis at the right internal carotid origin. 40-50% stenosis of the left internal artery origin.