Title: Screening Tool for Large Vessel Occlusion Strokes?<br/>Author: WanTsu Wendy Chang<br/><a href='http://umem.org/profiles/faculty/1322/'>[Click to email author]</a><hr/><div style="font-family:'Helvetica Neue';font-size:14px;">
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<span style="font-size:14px;"><strong>Screening Tool for Large Vessel Occlusion Strokes (LVOS)?</strong></span></div>
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<span style="font-size:14px;">Endovascular intervention for acute ischemic stroke from ICA or proximal MCA occlusion is a Level IA recommendation<sup>1</sup>.</span></li>
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<span style="font-size:14px;">Identification of patients who may benefit from endovascular intervention begins in the prehospital setting.</span></li>
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<span style="font-size:14px;">Several prehospital stroke scales exist, but have not been validated using arterial imaging to determine the presence of LVOS.</span></li>
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<span style="font-size:14px;">The <strong>Field Assessment Stroke Triage for Emergency Destination (FAST-ED) scale</strong> (see Table 1) was designed based on items of the NIH Stroke Scale (NIHSS) with higher predictive value for LVOS.</span></li>
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<span style="font-size:14px;"><img alt="" src="https://umem.org/files/uploads/content/pearls/neuro/20160713_Table%201.jpg" style="width: 357px; height: 588px;" /></span></p>
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<span style="font-size:14px;">The FAST-ED scale has comparable accuracy to predict LVOS to the NIHSS, and higher accuracy compared to the Rapid Arterial Occlusion Evaluation (RACE) and the Cincinnati Prehospital Stroke Severity (CPSS) scale</span></li>
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<span style="font-size:14px;">The FAST-ED scale also provides 3 distinct groups for the likelihood of LVOS:</span>
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<span style="font-size:14px;">Score 0 or 1: <15%</span></li>
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<span style="font-size:14px;">Score 2 or 3: 30%</span></li>
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<span style="font-size:14px;">Score >= 4: >60%</span></li>
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<span style="font-size:14px;"><strong><u>Bottom Line</u>:</strong> Additional assessment of gaze deviation, aphasia and neglect, as included in the FAST-ED scale, increases the accuracy of predicting LVOS. </span></p>
<fieldset><legend>References</legend>
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Powers WJ, Derdeyn CP, Biller J, et al. 2015 American Heart Association/American Stroke Association Focused Update of the 2013 Guidelines for the Early Management of Patients with Acute Ischemic Stroke Regarding Endovascular Treatment: A Guideline for Healthcare Professionals From the American Heart Association/American Stroke Association. Stroke. 2015;46(10):3020-35.</li>
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Lima FO, Silva GS, Furie KL, et al. Field Assessment Stroke Triage for Emergency Destination: A Simple and Accurate Prehospital Scale to Detect Large Vessel Occlusion Strokes. Stroke. 2016 Jun 30. [Epub ahead of print]</li>
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<strong>Follow me on Twitter @EM_NCC</strong></p>
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