Narrow vs. wide complex QRS in patients with complete heart block

ECG Weekly Workout with Dr. Amal Mattu


A 86-year-old woman presents to the ED with generalized weakness. The following ECG is obtained:

Before watching this week’s video, ask yourself these questions:

  1. What ECG abnormalities do you notice?
  2. What is the rhythm?
  3. What is your differential for non-conducted P-waves?