Title: Neurally Mediated Syncope - Part 2<br/>Author: Danya Khoujah<br/><a href='http://umem.org/profiles/faculty/739/'>[Click to email author]</a><hr/><p> </p> <p> <span style="font-size:12px;"><span style="font-family:arial,helvetica,sans-serif;">Vasovagal syncope is a subtype of neurally mediated syncope, and it is distinctly different from orthostatic hypotension. </span></span></p> <p> <span style="font-size:12px;"><span style="font-family:arial,helvetica,sans-serif;">Patients with orthostatic syncope have severe orthostatic hypotension that results in transient loss of consciousness <span style="font-weight: bold; font-style: italic;">immediately</span> or <span style="font-weight: bold; font-style: italic;">within moments</span> of standing up. This is different from neurally mediated syncope, which develops <em><strong>gradually</strong></em> under conditions of prolonged orthostatic stress such as standing for <em><strong>several minutes</strong></em>. Tilt table testing is useful for true orthostatic syncope, but not for neurally mediated syncope. In addition, checking for “orthostatic hypotension” may not capture patient with orthostatic syncope, because the hypotension occurs so quickly after standing up. Of note, patients may still have orthostatic tachycardia or intolerance with neurally mediated syncope. </span></span></p> <div> </div> <div> </div> <fieldset><legend>References</legend>
<div> <span helvetica="" style="font-size: 14px; font-family: ">Cheshire WP. Syncope. </span><span helvetica="" style="font-size: 14px; font-family: "><em>Continuum</em> 2017;23(2):335–358.</span></div> </fieldset>