Differential Diagnoses: the main three things that cause narrow complex regular tachycardias

ECG Weekly Workout with Dr. Amal Mattu


A 51-year-old man presents to the ED with generalized weakness and palpitations. The following prehospital ECG is obtained:

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

  1. ECG abnormalities do you notice?
  2. What are 3 possible differentials for this narrow complex tachycardia?
  3. How would you treat this patient?