Shark fin sign: A rare EKG finding in a patient with Takotsubo cardiomyopathy from influenza A infection.

This case demonstrated the rare "shark fin" ECG pattern, an ST-segment elevation typically seen in acute myocardial infarction. We reported a case of takotsubo cardiomyopathy secondary to influenza A infection with multiple organ failure, showing the shark fin sign and resulting in in-patient mortality and various complication.