Cerebrovascular diseases
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Cerebrovascular diseases · Jan 2008
Comparative StudyAssessment of feasibility of endovascular treatment of ruptured intracranial aneurysms with 16-detector row CT angiography.
It is unclear whether 16-detector row CT angiography (CTA) can replace digital subtraction angiography (DSA) to assess the feasibility of endovascular treatment (EVT) in the acute phase after aneurysmal subarachnoid hemorrhage. ⋯ In our series of patients, 16-detector row CTA was a reliable investigation to assess feasibility of EVT of ruptured intracranial aneurysms in most patients. Further, we found that interobserver disagreement on feasibility of EVT was considerable.
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Cerebrovascular diseases · Jan 2008
Controlled Clinical TrialProspective evaluation of multidetector-row CT angiography for the diagnosis of vasospasm following subarachnoid hemorrhage: a comparison with digital subtraction angiography.
To evaluate the accuracy of multidetector-row CT angiography (CTA) for the diagnosis of large-vessel vasospasm following subarachnoid hemorrhage by comparison to digital subtraction angiography (DSA). ⋯ Compared to the gold standard of DSA, CTA is accurate for the detection of large-vessel vasospasm, and has a very high NPV.
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Cerebrovascular diseases · Jan 2008
Comparative StudyVisual grading system for vasospasm based on perfusion CT imaging: comparisons with conventional angiography and quantitative perfusion CT.
The purpose of this study was to compare simple visual grading of perfusion CT (PCT) maps to a more quantitative, threshold-based interpretation of PCT parameters in the characterization of presence and severity of vasospasm. ⋯ We propose a user-friendly visual grading system for PCT maps in patients with suspected vasospasm. This visual approach compares favorably to the results of DSA. Sensitive MTT maps should be used for screening, and specific CBF maps for confirmation of vasospasm.
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Cerebrovascular diseases · Jan 2008
ReviewUse of 31P magnetic resonance spectroscopy to study the effect of cortical magnesium and energy metabolism after subarachnoid hemorrhage.
Flow metabolism coupling ensures adequate cerebral oxygenation. When subarachnoid hemorrhage (SAH) occurs, the flow metabolism coupling lost its balance and results in cerebral ischemia and infarction second to cortical magnesium and energy metabolism alternation. During chronic vasospasm, change in cortical energy metabolism is coupled with change in cerebral blood flow after SAH. ⋯ (31)P MRS data, combined with other MRI sequences, provide a comprehensive assessment of both structural and functional deficits and a guidance on clinical therapy for SAH.
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Cerebrovascular diseases · Jan 2008
Improved detection of intracerebral hemorrhage with transcranial ultrasound perfusion imaging.
Ultrasound perfusion imaging (UPI) is a new approach for the assessment of brain perfusion. In contrast to the increasing experience with this method in patients with ischemic stroke, data on the value of UPI for the diagnosis of intracerebral hemorrhage (ICH) are lacking. ⋯ This study supports earlier work demonstrating the usefulness of native transcranial ultrasound for the diagnosis of ICH. UPI further improves diagnostic reliability and allows very precise ICH volume measurements. If confirmed in larger studies, this approach may be useful for bedside monitoring of ICH progression and regression.