Which electrocardiogram result rules out Mahaim fibers in the differential diagnosis of 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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Given the pathway length and decremental conduction properties (similar to AV nodal conduction), a preexcited QRS complex with a short PR interval essentially rules out Mahaim fibers.

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