Unraveling WPW Syndrome: Challenging Cases and Nuances of Treatment

ECG Weekly Workout with Dr. Amal Mattu


A 15-year-old male with a history of asthma presents with palpitations while playing football.  On arrival, he is found to have a narrow complex regular tachycardia most consistent with SVT. The following ECGs are obtained on arrival (top) and after 2 doses of adenosine (bottom):

Before watching the video, ask yourself:

    1. How would you interpret the ECGs shown?
    2. What is the most likely cause of the change in rhythm?
    3. What is the next best step in treatment?