Biomaterial Database

Modalities of collateral supply of cerebral circulation through the circle of Willis in stenoses and occlusions of extracranial carotid arteries. 1992

C Sipoş

Clinic of Neurology, Tîrgu Mureş, Romania.

The intracranial cerebral circulation was studied in 6 patients with bilateral ischemic lesions due to lesions of the internal carotid artery in the extracranial segment (2 significant bilateral stenosis cases; 1 case with bilateral thrombosis and 3 cases of unilateral thrombosis and significant controlateral stenosis). All the patients were males their age ranging between the 5th and 8th decades of life. In a single case, the neurological examination showed secondary left hemiplegia and recent right paresis of remittent type whereas the other 5 patients had only transient ischemic attacks with hemiparesis or transient aphasia. The lesions were revealed by duplex system echotomography (Aloka-Hellige Model SSD-630) and spectral analysis of Doppler signal (Vasoscan-Sonicaid) and were later confirmed by bilateral carotid arteriography in all patients. The intracranial circulation was also watched by noninvasive methods using the spectral analysis of the Doppler signal with pulsed wave on TC-2 64-B apparatus. As for the modalities of blood flow compensatory mechanisms by the circle of Willis, it may be noted that in none of the patients investigated did the collateral supply observe a "mathematical model".

UI	MeSH Term	Description	Entries
D008297	Male		Males
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D001783	Blood Flow Velocity	A value equal to the total volume flow divided by the cross-sectional area of the vascular bed.	Blood Flow Velocities,Flow Velocities, Blood,Flow Velocity, Blood,Velocities, Blood Flow,Velocity, Blood Flow
D001921	Brain	The part of CENTRAL NERVOUS SYSTEM that is contained within the skull (CRANIUM). Arising from the NEURAL TUBE, the embryonic brain is comprised of three major parts including PROSENCEPHALON (the forebrain); MESENCEPHALON (the midbrain); and RHOMBENCEPHALON (the hindbrain). The developed brain consists of CEREBRUM; CEREBELLUM; and other structures in the BRAIN STEM.	Encephalon
D002341	Carotid Artery Thrombosis	Blood clot formation in any part of the CAROTID ARTERIES. This may produce CAROTID STENOSIS or occlusion of the vessel, leading to TRANSIENT ISCHEMIC ATTACK; CEREBRAL INFARCTION; or AMAUROSIS FUGAX.	Thrombosis, Carotid Artery,Carotid Thrombosis,Common Carotid Artery Thrombosis,External Carotid Artery Thrombosis,Internal Carotid Artery Thrombosis,Thrombosis, Carotid,Thrombosis, Common Carotid Artery,Thrombosis, External Carotid Artery,Thrombosis, Internal Carotid Artery,Carotid Artery Thromboses
D002343	Carotid Artery, Internal	Branch of the common carotid artery which supplies the anterior part of the brain, the eye and its appendages, the forehead and nose.	Arteries, Internal Carotid,Artery, Internal Carotid,Carotid Arteries, Internal,Internal Carotid Arteries,Internal Carotid Artery
D002546	Ischemic Attack, Transient	Brief reversible episodes of focal, nonconvulsive ischemic dysfunction of the brain having a duration of less than 24 hours, and usually less than one hour, caused by transient thrombotic or embolic blood vessel occlusion or stenosis. Events may be classified by arterial distribution, temporal pattern, or etiology (e.g., embolic vs. thrombotic). (From Adams et al., Principles of Neurology, 6th ed, pp814-6)	Brain Stem Ischemia, Transient,Cerebral Ischemia, Transient,Crescendo Transient Ischemic Attacks,Transient Ischemic Attack,Anterior Circulation Transient Ischemic Attack,Brain Stem Transient Ischemic Attack,Brain TIA,Brainstem Ischemia, Transient,Brainstem Transient Ischemic Attack,Carotid Circulation Transient Ischemic Attack,Posterior Circulation Transient Ischemic Attack,TIA (Transient Ischemic Attack),Transient Ischemic Attack, Anterior Circulation,Transient Ischemic Attack, Brain Stem,Transient Ischemic Attack, Brainstem,Transient Ischemic Attack, Carotid Circulation,Transient Ischemic Attack, Posterior Circulation,Transient Ischemic Attack, Vertebrobasilar Circulation,Transient Ischemic Attacks, Crescendo,Vertebrobasilar Circulation Transient Ischemic Attack,Attack, Transient Ischemic,Attacks, Transient Ischemic,Brainstem Ischemias, Transient,Cerebral Ischemias, Transient,Ischemia, Transient Brainstem,Ischemia, Transient Cerebral,Ischemias, Transient Brainstem,Ischemias, Transient Cerebral,Ischemic Attacks, Transient,TIA, Brain,TIAs (Transient Ischemic Attack),Transient Brainstem Ischemia,Transient Cerebral Ischemia,Transient Cerebral Ischemias,Transient Ischemic Attacks
D002941	Circle of Willis	A polygonal anastomosis at the base of the brain formed by the internal carotid (CAROTID ARTERY, INTERNAL), proximal parts of the anterior, middle, and posterior cerebral arteries (ANTERIOR CEREBRAL ARTERY; MIDDLE CEREBRAL ARTERY; POSTERIOR CEREBRAL ARTERY), the anterior communicating artery and the posterior communicating arteries.	Cerebral Arterial Circle,Willis' Circle,Arterial Circle, Cerebral,Circle, Willis',Willis Circle
D003097	Collateral Circulation	Maintenance of blood flow to an organ despite obstruction of a principal vessel. Blood flow is maintained through small vessels.	Blood Circulation, Collateral,Circulation, Collateral,Collateral Blood Circulation,Collateral Circulation, Blood,Blood Collateral Circulation,Circulation, Blood Collateral,Circulation, Collateral Blood,Collateral Blood Circulations,Collateral Circulations,Collateral Circulations, Blood
D004453	Echoencephalography	Use of reflected ultrasound in the diagnosis of intracranial pathologic processes.	Echoencephalographies