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Angiographic examination via the internal carotid artery (ICA) in a patient with subarachnoid haemorrhage (SAH). (a) Angiogram at time of arrival showing an anterior communicant artery aneurysm (ACoA). (b) Severe vasospasm shown on angiogram 4 days post-treatment before intra-arterial nimodipine (IAN). (c) Angiogram immediately after administration of IAN.
