This study consisted of an analysis of autopsy material from 3,824 persons who were 30 years of age or older in whom the arterial circle of Willis was scored for the severity and extent of atherosclerosis. Several criteria were used for hypertension. These consisted of the heart weight, the clinical diagnosis of hypertension, and the blood pressure. Regardless of which criterion was used, a def...

We sought to determine the prevalence of fetal posterior cerebral artery (fPCA) and if fPCA was associated with specific stroke etiology and vessel territory affected. This paper is a retrospective review of prospectively identified patients with acute ischemic stroke from July 2008 to December 2010. We defined complete fPCA as absence of a P1 segment linking the basilar with the PCA and partia...

The intracranial collateral channels apart from the circle of Willis have been studied angiographically in 34 patients with internal carotid artery occlusion and 19 with occlusion of the middle cerebral artery. These collaterals are present in a high percentage of cases within a week of the ictus and are more common when the stroke has developed slowly. Their presence in occlusion of the middle...

Address for Correspondence: Dr. Bishwajeet Saikia, Department of Anatomy, North Eastern Indira Gandhi Regional Institute of Health & Medical Sciences, Shillong–793018, Meghalaya, India. Phone: 91-9401059365. E-Mail: [email protected] Access this Article online Quick Response code Web site: *1,4 Senior Resident Doctor, 2,5 Associate Professor, 3 Assistant Professor. 1,5 Department of A...

In order to obtain information about the relationship between variations in the circle of Willis and aneurysms, 44 complete circles of Willis with aneurysm were studied macroscopically. The incidence of variations was significantly higher in the aneurysm series than in the control circles without aneurysm. There was a definite correlation between asymmetric proximal segments of the anterior cer...