Cerebrovascular diseases
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Cerebrovascular diseases · Jan 2008
Comparative StudyDisplay of dural sinuses with time-resolved, contrast-enhanced three-dimensional MR venography.
Time-resolved (TR) contrast-enhanced 3D MR angiography has recently received considerable attention for the workup of cerebrovascular diseases, foremost dural arteriovenous fistula and arteriovenous malformation, and potentially for the evaluation of dural sinus thrombosis. Thereby, the dynamic visualization of cerebral vessels is enabled similar to the principle of digital subtraction angiography. Yet, its voxel size is relatively large due to an inherent trade-off between the desired spatial and temporal resolutions. The goal of this study was to evaluate whether the limited spatial resolution of TR MR venography (MRV) is sufficient to visualize dural venous sinuses. ⋯ Despite the inferior spatial resolution, TR MRV depicted some large dural sinuses more clearly than TOF MRV. To overcome the visualization of smaller venous structures, TR MRV can be applied complementarily with high-resolution steady-state contrast-enhanced MRV.
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Cerebrovascular diseases · Jan 2008
Longitudinal investigations on the anterograde and retrograde degeneration in the pyramidal tract following pontine infarction with diffusion tensor imaging.
Secondary degeneration following supratentorial stroke has been detected by some studies using diffusion tensor imaging (DTI), but the anterograde and retrograde degeneration in pyramidal tract after pontine infarction and its potential clinical significance are not well understood. ⋯ Progressive anterograde and retrograde degeneration in pyramidal tract revealed by DTI may hinder the process of neurological recovery after a pontine infarct. To confirm the clinical significance, future studies with a longer observation period and a larger sample size of patients with more homogeneous pontine infarcts are still needed.
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Cerebrovascular diseases · Jan 2008
Stroke incidence in women under 60 years of age related to alcohol intake and smoking habit.
The association between alcohol intake, cigarette smoking and risk of stroke amongst women remains unclear, especially in young women. ⋯ Light to moderate alcohol intake, regardless of type of alcoholic beverage, reduces risk of stroke among women under 60 years of age, in particular those women who were never smokers. Smoking increases the risk of stroke, especially ischemic stroke.
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Cerebrovascular diseases · Jan 2008
Brain natriuretic peptide as a surrogate marker for cardioembolic stroke with paroxysmal atrial fibrillation.
Cardioembolic stroke generally results in severer disability, since it typically has a larger ischemic area than the other types of ischemic stroke. However, it is difficult to differentiate cardioembolic from noncardioembolic stroke (atherothrombotic and lacunar stroke), whenever ischemic stroke patients have sinus rhythm at the time of presentation. ⋯ From our results, it was suggested that the first-day brain natriuretic peptide and left atrial appendage flow measurements would be helpful in differentiating cardioembolic stroke with atrial fibrillation from noncardioembolic stroke.
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Cerebrovascular diseases · Jan 2008
Transcranial ultrasound from diagnosis to early stroke treatment. 1. Feasibility of prehospital cerebrovascular assessment.
To test whether portable duplex ultrasound devices can be used in a prehospital '911' emergency situation to assess intracranial arteries. ⋯ Emergency assessment of intracranial arteries using portable duplex ultrasound devices is feasible shortly after arrival at the patient's site.