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Fig 1. Representative sequential angiograms obtained in a dog after induction of the dual hemorrhage model of SAH. The left panel presents the control angiogram before induction of SAH. The middle panel depicts the diameter of the basilar artery 3 days after the first cisternal injection of blood. The right panel depicts the appearance of the basilar artery 3 days after the second cisternal injection of blood. The arrow indicates the narrowest point in the basilar artery, which shows vasospasm where sequential measurements were made.
