STAT ECG Diagnoses: antiarrhythmic considerations in patients with unstable irregular tachydysrrhythmias

ECG Weekly Workout with Dr. Amal Mattu


A 29-year-old male with no significant known PMHx presents to the ED with palpitations. He is found to be markedly tachycardic on arrival. The following ECG is obtained:

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

  1. What is the heart rate and underlying rhythm?
  2. What class of antiarrhythmic is amiodarone and why should it be avoided in this rhythm?