Abstract
The cerebral angiograms of patients with cerebrovascular diseases, head injury and intracranial tumours obtained under normal and pharmacologically increased blood pressure were compared. Changes in cerebral blood flow, circulation time and arterial diameter were examined. CBF was measured by a semiquantitative densitometric method, arterial diameter by a split-image focusing technique. The majority of patients with normal angiograms showed a virtually constant CBF and circulation time, while there was a slight constriction of the arteries. The functional tests during cerebral angiography revealed disturbances of autoregulation in patients with acute cerebrovascular diseases or with intracranial tumours.
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