Collateral circulation is alternate circulation around a blocked artery or vein via another path. It is maintained via a network of collateral XXXXXXXX XXXX anastomose in XXX circle of Willis. XXX vasculature is XXXXXXX XXX XXX XXXXXXXX excepting other XXXXXXXXXX XXXX XX the XXXXXXXXX XXX XXXXXXXXXX.
The XXXXXXXXXXX XX the XXXXXXXX collateral circulatory channels during embryonic XXXXXX XXXXXXXXX XXX XXXXXXX XXXXXX development. In the XXXXX, several arterial XXXXXXXX XXXXXXXX XXXXXXXXXXXX the cerebral arteries. XXXXX XXXXXXXX XXXXXX after birth XXX XXXX the anatomical XXXXX XX XXXXXXXX XXXXXXXXXX XXXXXXXXXXX. New collateral channels XXX also develop XXXXX birth, but the XXXXXXX of new XXXXXXXXXXXX in XXX XXXXX is not XXXX XXXXXXXXXX.
Cerebral blood XXXX XX maintained XXXXXXXXXX XXXXXX by XXX XXXXXXXX arterial XXXXXXXXXXXXXX. In normal individuals, cerebral blood XXXX. XX XXXXXXXXXX XX a XXXXXXXX XXXX with XXXX XXXXXXXX pressure XXXXXXXXXXX XXXXXXX. XXXXXXXXXXXXX 50 XXX XXX mmHg.
In addition to XXX relatively XXXXX compensatory XXXXXXXX, there is a XXXXXX XXXXXXXX mediated XX XXXXXXXXX XXX XXXXX XXXX well understood XXXXXXX. XXXXXXXXXXXX or development XX effective new conductive arterial vessels in XXX XXXXX XXX not been XXXXXXXXXXXX XXXXXX in XXX XXXXX brain, XXXX XXX XXXXXXXXX of XXXXXXXX XXXXXXXXXX such XX moyamoya XXXXXXX.
The XXXXXXXXXXXXX of XXX XXXXXXXX XXXXXXXXXX circulation may XXXX in the setting XX XXXXX XXX chronic XXXXX XXXXXXXX XXXXXXXXX XXXX carotid XXXXXX XXXXXXXX/occlusion. XXX XXXXXXXXXX XXXXXXXX XX XXX collaterals
XXXXX brain XXXXXXXXXX due XX XXXXXXX XXXXXX occlusion XXX XXXX associated XXXX XXXX XXXXXXX. XXXXXXXX with XXXXXX XXXXXXXXXX flow XXXX better XXXXXXXX XXXXXXXX. XXXXXXXXXXX XXXX XXX XXXXXXXX carotID artery XX XXX petrous XXXXXXX XX XXX XXXXXXXX carotids XXX XX a XXXXXXX predictor for successful recanalization.
XXXXXXXX collateral XXXXXXXXXXX XXXXX an XXXXXXXXX role preserving XXXXX tissue XXXXXXXXX. XXXX collateral circulation is a favorable XXXXXXXXXX factor in carotid artery XXXXXXX. Future XXXXXXXX developments in imaging XXXXXXX will XXXXXX XXXXXXX our XXXXXXXXXXXXX of the role of XXX XXXXXXXX XXXXXXXXXX XXXXXXXXXXX.
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