Differential Diagnoses: rollercoaster T waves

ECG Weekly Workout with Dr. Amal Mattu


A 45-year-old woman presents to the ED with lethargy. BP = 100/50, HR = 60, RR= 12 & shallow. Her nurse thought her rhythm looked abnormal on the cardiac monitor and the following ECG was obtained:

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

  1. What ECG abnormalities do you notice?
  2. What is your differential diagnosis for T-wave inversions?
  3. What is the most likely cause of the markedly prolonged QT-interval?