Acute hypoperfusion immediately after subarachnoid hemorrhage: a xenon contrast-enhanced CT study

Journal of Neurotrauma
Gerrit Alexander SchubertClaudius Thomé

Abstract

The acute neurological deficit present immediately after subarachnoid hemorrhage (SAH) correlates with overall outcome. Only limited data are available to quantify changes in cerebral perfusion in this acute phase, and this study sought to characterize those changes within the first 12 h post-SAH. Xenon contrast-enhanced CT scanning was performed in 17 patients (Hunt and Hess grade [HH] 1-3, n = 9; HH 4-5, n = 8) within 12 h after SAH. Cerebral blood flow (CBF) was analyzed in all cortical and central vascular regions of interest (ROI), as well as infratentorial ROI. Hemodynamic stress distribution (central/cortical ROI) was also calculated. Asymptomatic patients without perfusion deficits served as controls (n = 5), and Glasgow Outcome Scale score (GOS) was determined 3 months after the event. Intracranial pressure (ICP) and cerebral perfusion pressure (CPP) were within normal limits in all patients. CBF was significantly reduced in all patients with SAH (34 mL/100 g x min) compared to controls (67 mL/100 g x min; p < 0.001). Patients in better clinical condition (HH 1-3) presented with significantly less reduction of CBF (41 mL/100 g x min) compared to patients with more severe hemorrhage (HH 4-5: 24 mL/100 g x min; p < 0.001...Continue Reading

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Methods Mentioned

BETA
sedation

Software Mentioned

Systat
XeCT System
SigmaStat

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