Each brachiocephalic soon sends off its subclavian, while in the normal or more usual cases the rest proceeds as the carotid trunk, inclusive of the vertebral artery.
That in which both' a right carotid artery and a left are present.
A carotid angiogram is an Xray of the circulation to the brain taken by injecting dye (contrast) into the carotid artery.
It is non-invasive and has replaced arteriography as the investigation of choice in the assessment of carotid artery disease and in post-operative graft surveillance.
The common carotid is on the right and the internal carotid is on the top.