The Results showed well-developed collateral flow in the left hemisphere (Fig 3) via the circle of Willis, enhanced in part by a sump effect created by the shunting of left ICA blood into the fistula.

A 33 year-old man developed the explosive onset of a headache followed by nausea and vomiting. Subarachnoid Hemorrhage - Anterior Cerebral Artery Aneurysm. (Left) Axial CT scan without contrast; ...

When a watershed infarct is seen unilaterally, this is usually due to hemodynamic narrowing of a proximal artery (in this case, the carotid artery) without intact collateral vessels (e.g., an ...

An incomplete Circle of Willis, defined by aplasia of any arterial segment, was present in 875 (77.7%) patients. The most common variation found was aplasia of the right posterior communicating artery ...

Background Ocular ischemic syndrome (OIS) and subsequent neovascular glaucoma (NVG) lead to irreversible visual impairment. This study aimed to investigate the association of carotid artery ...

Patients with chronic carotid occlusion (CCO) may present as either symptomatic or asymptomatic, with significant differences in prognosis and treatment strategies between these groups. Anterograde ...

A berry aneurysm is a weakened, bulging area in the wall of an artery that serves the brain. Read about risk factors, symptoms, treatment, and more.

Any change in flow in the common carotid artery resulting from obstruction of the other cerebral vessels entering the circle of Willis was assumed to be directed to the internal carotid artery.

They find that the anterior portions of the circle of Willis, including the internal carotid arteries (CaDI), establish acta2 expression earlier than posterior aspects, likely due to faster flow rate ...

The nature of cerebral hemodynamics in patients with internal carotid artery occlusion (ICAO) depends mainly on the cerebral arterial circle (CAC) or circle of Willis, which determines the long-term ...