Ischemic Stroke And Carotid Endarterectomy

Anastomotic networks exist in the adult circulation to help provide sources of collateral flow. The most prominent extracranial anasto-motic channels are those between the external and the internal carotid artery. Occlusion of the proximal ICA results in retrograde blood flow in the ophthalmic artery, which serves to provide flow to the ICA region. The circle of Willis also serves as a collateral system. Its significance lies in its arrangement, which allows for flow to continue uninterrupted, despite complete occlusion of one of its constituent vessels. Variations in the anatomical arrangement are responsible for the limitations of the system to fully compensate and provide nourishment to the brain in cases of ischemic events. Leptomeningeal vessels constitute the primary anastomotic network on the surface of the cerebrum and cerebellum [4]. Although this system is usually quiescent, proximal vessel occlusion leads to a pressure differential, which allows blood to reach the areas with lowered cerebral perfusion pressure.

Cure Your Yeast Infection For Good

Cure Your Yeast Infection For Good

The term vaginitis is one that is applied to any inflammation or infection of the vagina, and there are many different conditions that are categorized together under this ‘broad’ heading, including bacterial vaginosis, trichomoniasis and non-infectious vaginitis.

Get My Free Ebook


Post a comment