Angiographic observation in occlusive cerebrovascular disease

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Abstract
Thrombosis of individual branches of the main cerebral arteries can be diagnosed by observation of filling of a given area through collateral channels. This cannot be accomplished without adequate serial films to record all phases of the cerebral circulation during angiography. Extreme slowness of the circulation in the arterial channels filled by collateral flow may be local or generalized. The arterial circulation time is usually increased with thrombosis. Arterial spasm, as manifested by narrowing of arterial channels on cerebral angiography, is relatively uncommon.

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