STAT ECG Diagnoses: when to cardiovert narrrow complex irregular tachycardias

ECG Weekly Workout with Dr. Amal Mattu


A 76-year-old woman presents to the ED with fever and signs of sepsis. She is found to be tachycardic, BP 80/45, RR 24, SpO2 94%, 38ÂșC. The following ECG is obtained on arrival with no prior ECGs available for comparison:

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

  1. What is the rhythm?
  2. What is your differential diagnosis and most likely cause?
  3. Would you cardiovert this patient?