Rhythm Interpretation: using lewis leads to nail the diagnosis

ECG Weekly Workout with Dr. Amal Mattu


A 85-year-old male presents to the emergency department with lightheadedness and palpitations. The following ECG was obtained on arrival:

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

  1. What ECG abnormalities do you notice?
  2. What is the underlying rhythm?
  3. What is your differential diagnosis?
  4. What can be done to modify the ECG leads to help differentiate between atrial and ventricular dysrhythmias?