25th May 2025

A 23-year-old male presents to the acute medical unit with syncope.

A 23-year-old male presents to the acute medical unit with syncope. He recalls feeling a flutter in his chest, and he collapsed. He was unconscious and unarousable for 45 seconds before regaining consciousness without confusion. His father died suddenly at 34 with no apparent cause identified on autopsy. He reports having drunk approximately 5 pints of beer prior to the episode. Physical examination and blood tests were unremarkable. An ECG showed coved ST-elevation with T-wave inversion in leads V1-V3. QTc duration was 460ms.

Which of the following is the most likely underlying diagnosis?

Select the SINGLE most appropriate option from the list below. Select ONE option only.