Wolff-Parkinson-White (WPW) Syndrome with Supraventricular Tachycardia (SVT)

ECG Weekly Workout with Dr. Amal Mattu


A 24-year-old man with past medical history of WPW syndrome s/p ablation presents to the emergency department with palpitations. On arrival, he is found to have a wide complex tachycardia and the following ECGs are obtained before and after treatment with procainamide.

Before watching the video, ask yourself:

    1. How would you interpret the rhythm of the arrival and post cardioversion ECGs?
    2. What is the difference between orthodromic and antidromic SVT?
    3. How does the presence of WPW syndrome affect the approach to treating arrhythmias compared to those without WPW?