Internal Carotid Artery Occlusion - Case 3

A 57 year-old man presented with a mild headaches. His examination was normal. An MRI of the brain suggested an abnormality of the left internal carotid artery which led to the patient undergoing a cerebral angiogram.

                      Show the Flow from the Right to Left Hemisphere                                                            Show the Occluded Internal Carotid
Cerebral Angiogram. (Left) right internal carotid injection - AP view; (Right) left common carotid artery injection, AP view. Note that the left internal carotid artery is completely occluded. The entire right hemisphere is being perfused from the contralateral side. Thus, with an intact circle of Willis, some patients can be completely asymptomatic from a carotid occlusion.