How is the orthodromic tachycardia characterized on ECG in 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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In orthodromic tachycardia, the normal pathway is used for ventricular depolarization, and the AP is used for the retrograde conduction essential for reentry. On ECG findings, the delta wave is absent, the QRS complex is normal, and P waves are typically inverted in the inferior and lateral leads.

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