Correlations between cerebral arterial velocities, blood flow, and delayed ischemia after subarachnoid hemorrhage.

摘要: Elevated middle cerebral erythrocyte velocities and tissue hypoperfusion have been correlated with delayed ischemia after subarachnoid hemorrhage, but few studies compared serial arterial blood flow neurological deficits. Serial measurements of velocities, using transcranial Doppler ultrasonography, were performed in 34 patients hemorrhage flow, measured 20 the single-photon emission computed tomography technetium-99m hexamethylpropylene amine oxime evidence ischemia. In 16 without ischemia, eight had vasospasm (greater than 120 cm/sec), only one seven hypoperfusion, suggesting that might be more common this group (p = 0.1). In 10 a lateralizing deficit, both asymmetrical (eight nine vasospasm) (six six studied) concordant clinically ischemic hemisphere less 0.05). Vasospasm occurred nonlateralized five six, affecting anterior territory three. Concordant most often present deficits. Discordant results reflect inherent limitations different levels circulation monitored by two techniques.