mrcem2-0146

A 28-year-old woman presents after experiencing a syncopal episode earlier in the day. She fainted while jogging on the treadmill at her local gym. She regained consciousness quickly and currently feels completely fine. Upon examination, she has a slim physique, normal heart sounds without any additional sounds or murmurs, clear lungs, and a soft abdomen. She is originally from Thailand and mentions that her mother passed away suddenly in her 30s.

Her ECG reveals:
– Right bundle branch block pattern
– Downward-sloping ‘coved’ ST elevation in leads V1-V3
– Widespread upward-sloping ST depression in other leads

What is the SINGLE most likely diagnosis?