MRA of the Aortic Arch with Contrast Bolus. This study is complementary to the standard neck and intracranial MRA. It allows visualization of the common carotids, and especially the origin of the ...

The arteriogram, shown in Figure 1, demonstrated stenosis of the left subclavian artery 2.5 cm. distal to the aorta and just proximal to the origin of the left vertebral artery.

The right subclavian artery is occluded at its origin (a). The distal portion of the right vertebral artery is filling retrogradely. The proximal left subclavian artery is partially obstructed at ...

Spinal Cord - The anterior spinal artery origin: ... The ASA originated from the vertebral artery as a paired right and left rami in all but one specimen in which only the left ASA was present.

Cerebral angiogram, Left vertebral artery injection; (Left) AP view; (Right) Lateral view. Note the aneurysm arising from the vertebral artery at the origin of the posterior inferior cerebellar artery ...

Figure 1. Anatomy of the vertebral artery. C2 represents the second cervical vertebrae, C6 is the sixth cervical vertebrae. V1, V2, V3 and V4 are the anatomic segments of the vertebral artery.

Neck pain or an injury can leave you feeling dizzy. This condition, known as bow hunter’s syndrome or rotational vertebral artery syndrome, makes you feel faint or dizzy when you turn your head.