Wide Complex Tachycardias: using old ECGs, Lewis leads, and rabbit ears to distinguish VT from SVT

ECG Weekly Workout with Dr. Amal Mattu


A 48-year-old woman presents to the emergency department with palpitations. She is noted to be tachycardic at triage. The following ECG is obtained:

Before watching the video, look closely at this ECG and ask yourself:

  1. What is the heart rate and rhythm?
  2. How do you distinguish between ventricular tachycardia and SVT with a bundle branch block?