Narrow Complex Tachycardia: the maximum achievable sinus heart rate

ECG Weekly Workout with Dr. Amal Mattu


A 67-year-old woman is brought to the ED by EMS for palpitations. She is found to have a heart rate ~168. Vital signs are otherwise within normal limits aside from a respiratory rate of 22 with normal breath sounds. The following ECG is obtained:

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

  1. What ECG abnormalities do you notice?
  2. What is the rhythm?
  3. How would you manage this rhythm?