What is the significance of entrainment pacing on EPS 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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With entrainment pacing from the right ventricular (RV) apex, orthodromic reentrant tachycardia (ORT) will return with a V-A-V response, typically with a short (<115 ms) postpacing interval (PPI)–tachycardia cycle length (TCL) difference (PPI-TCL) if septal in origin. VA intervals remain fixed during SVT, and AV block cannot occur if the AV AP is critical to the circuit.

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