Title: Early Dual Antiplatelet Therapy for Stroke Prevention?<br/>Author: WanTsu Wendy Chang<br/><a href='http://umem.org/profiles/faculty/1322/'>[Click to email author]</a><hr/><p>
<span style="font-size:14px;"><span style="font-family:arial,helvetica,sans-serif;">Does using a combination of aspirin and clopidogrel decrease your patient’s risk of recurrent stroke after a minor ischemic stroke or high risk TIA event?</span></span></p>
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<span style="font-size:14px;"><span style="font-family:arial,helvetica,sans-serif;">The recent international Platelet-Oriented Inhibition in New TIA and Minor Stroke (POINT) trial compared 4881 patients receiving aspirin/clopidogrel vs. aspirin/placebo within 12 hours of symptom onset.</span></span>
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<span style="font-size:14px;"><span style="font-family:arial,helvetica,sans-serif;">Patients who received DAPT had a <i>lower </i>rate of major ischemic events at 90 days compared to aspirin/placebo (5.0% vs. 6.5%, p=0.02).</span></span></li>
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<span style="font-size:14px;"><span style="font-family:arial,helvetica,sans-serif;">However, patients who received DAPT had a <i>higher </i>rate of major hemorrhage compared to aspirin/placebo (0.9% vs. 0.4%, p=0.02).</span></span></li>
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<span style="font-size:14px;"><span style="font-family:arial,helvetica,sans-serif;">A similar Chinese study, the Clopidogrel in High-Risk Patients with Acute Nondisabling Cerebrovascular Events (CHANCE) trial, compared 5170 patients receiving DAPT vs. aspirin/placebo within 24 hours also found <i>lower </i>rate of stroke (8.2% vs. 11.7%, p<0.001) but <i>similar </i>rates of moderate/severe hemorrhage (0.3% vs. 0.3%, p=0.73).</span></span></li>
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<span style="font-size:14px;"><span style="font-family:arial,helvetica,sans-serif;">Major differences between these two trials are the population studied and the duration of DAPT, as POINT utilized DAPT for 90 days while CHANCE utilized DAPT for 21 days.</span></span></li>
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<strong><span style="font-size:14px;"><span style="font-family:arial,helvetica,sans-serif;"><u>Bottom Line</u>: </span></span></strong><span style="font-size:14px;"><span style="font-family:arial,helvetica,sans-serif;">The use of DAPT in minor ischemic stroke and high risk TIA reduces the risk of recurrent stroke. However, the duration of DAPT may affect the risk of major hemorrhage.</span></span></p>
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<fieldset><legend>References</legend>
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<span style="font-size: 14px;"><span style="font-family: arial, helvetica, sans-serif;">Johnston SC, Easton JD, Farrant M, <i>et al</i>. Clopidogrel and aspirin in acute ischemic stroke and high-risk TIA. <i>N Engl J Med</i>2018; 379(3):215-25.</span></span></li>
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<span style="font-size: 14px;"><span style="font-family: arial, helvetica, sans-serif;">Wang Y, Wang Y, Zhao X, <i>et al</i>. Clopidogrel with aspirin in acute minor stroke or transient ischemic attack. <i>N Engl J Med</i> 2013;369(1):11-9.</span></span></li>
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<strong style="font-family: arial, helvetica, sans-serif; font-size: 14px;"><em>Follow me on Twitter @EM_NCC</em></strong></p>
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