Which conditions with paroxysms of supraventricular tachycardia (SVT) need to be differentiated from Wolff-Parkinson-White (WPW) syndrome?

Updated: Jan 08, 2017
  • Author: Christopher R Ellis, MD, FACC, FHRS; Chief Editor: Mikhael F El-Chami, MD  more...
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Few entities that involve paroxysms of SVT with a WPW pattern electrocardiogram (ECG) in sinus rhythm may be differentiated from AP-mediated SVT. Examples include the following:

  • Low atrial focus, which occasionally produces the appearance of a short PR interval
  • Atriofascicular APs (so-called Mahaim fibers)
  • Lown-Ganong-Levine (LGL) syndrome

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