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      Sunday, January 29, 2023
      News & Perspective Drugs & Diseases CME & Education Academy Video Decision Point
      Perspective > Medscape Cardiology > ECG Challenge

      Changing QRS Complex Morphology

      Kyuhyun Wang, MD

      Disclosures

      December 17, 2007

      Question

      Why is the QRS complex morphology changing?

      A) Intermittent Wolff-Parkinson-White (WPW) syndrome

      B) Intermittent accelerated idioventricular rhythm

      C) Intermittent left bundle branch block

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