Literature Review: Shark Fin or “Triangular” ST segment morphology

Emergency Cardiology Literature Review & Updates with Dr. Amal Mattu


A 61-year-old male is brought to the ED with acute substernal chest pain and diaphoresis. The following ECG is obtained:

Before watching the video, ask yourself:

    1. What is your differential for the “shark fin” morphology of the waveforms seen?
    2. Would you empirically treat this patient for suspected hyperkalemia? 
    3. Would you activate the cath lab?