Stroke; a journal of cerebral circulation
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Randomized Controlled Trial Multicenter Study
Efficacy and safety of vorapaxar in patients with prior ischemic stroke.
Vorapaxar is an antiplatelet agent that antagonizes thrombin-mediated activation of the protease-activated receptor-1 on platelets. We tested the efficacy and safety of vorapaxar in a prespecified analysis in the stroke subcohort from a multinational, randomized, placebo-controlled trial. ⋯ In patients with prior ischemic stroke who receive standard antiplatelet therapy, adding vorapaxar increased the risk of intracranial hemorrhage without an improvement in major vascular events, including ischemic stroke. These findings add to the accumulating evidence establishing important risks with combination antiplatelet therapy in patients with prior stroke. Clinical Trial Registration Information- http://www.clinicaltrials.gov. Unique identifier: NCT00526474.
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Randomized Controlled Trial Multicenter Study
Minimally invasive surgery plus recombinant tissue-type plasminogen activator for intracerebral hemorrhage evacuation decreases perihematomal edema.
Perihematomal edema (PHE) can worsen outcomes after intracerebral hemorrhage (ICH). Reports suggest that blood degradation products lead to PHE. We hypothesized that hematoma evacuation will reduce PHE volume and that treatment with recombinant tissue-type plasminogen activator (rt-PA) will not exacerbate it. ⋯ Hematoma evacuation is associated with significant reduction in PHE. Furthermore, PHE does not seem to be exacerbated by rt-PA, making such neurotoxic effects unlikely when the drug is delivered to intracranial clot.
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Multicenter Study Comparative Study
Early diffusion-weighted imaging and perfusion-weighted imaging lesion volumes forecast final infarct size in DEFUSE 2.
It is hypothesized that early diffusion-weighted imaging (DWI) lesions accurately estimate the size of the irreversibly injured core and thresholded perfusion-weighted imaging (PWI) lesions (time to maximum of tissue residue function [Tmax] >6 seconds) approximate the volume of critically hypoperfused tissue. With incomplete reperfusion, the union of baseline DWI and posttreatment PWI is hypothesized to predict infarct volume. ⋯ Baseline DWI and early follow-up PWI (Tmax >6 seconds) volumes provide a reasonable approximation of final infarct volume after endovascular therapy.
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Randomized Controlled Trial Multicenter Study
Results of Membrane-Activated Chelator Stroke Intervention randomized trial of DP-b99 in acute ischemic stroke.
DP-b99, a lipophilic moderate-affinity chelator of zinc, was postulated to improve recovery after acute ischemic stroke. We evaluated the safety and therapeutic effects of DP-b99 in patients with acute hemispheric ischemic stroke. ⋯ Despite encouraging preclinical and phase II trial data, DP-b99 shows no evidence of efficacy in treating human ischemic stroke.
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Multicenter Study
The Modified Graeb Score: an enhanced tool for intraventricular hemorrhage measurement and prediction of functional outcome.
Simple and rapid measures of intraventricular hemorrhage (IVH) volume are lacking. We developed and validated a modification of the original Graeb scale to facilitate rapid assessment of IVH over time. ⋯ The mGS, a semiquantitative scale for IVH volume measurement, is a reliable measure with prognostic validity suitable for rapid use in clinical practice and in research.