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Figure 1: Changes in left ICA diameter (left panels) and right ICA diameter (right panels) as assessed at different time points after intrathecal arterial blood injection of various volume combinations. (a) Maximal percentage of vasoconstriction of the ICA after different volume combination injections measured 7–14 days after the first injection. (b) Time course of cerebral arterial spasm following various volume combination injections on day 0

Figure 1: Changes in left ICA diameter (left panels) and right ICA diameter (right panels) as assessed at different time points after intrathecal arterial blood injection of various volume combinations. (a) Maximal percentage of vasoconstriction of the ICA after different volume combination injections measured 7–14 days after the first injection. (b) Time course of cerebral arterial spasm following various volume combination injections on day 0