10th May 2025

A 56-year-old male presented to A&E with sudden black out while shopping in a supermarket.

A 56-year-old male presented to A&E with sudden black out while shopping in a supermarket. It was witnessed by bystanders, he was mentioned to have a brief jerking of his limbs for a few seconds. He recovered within a minute. Notes from emergency service showed he had an heart rate (HR) of 40/min, blood pressure (BP) of 90/60 mmHg and initial ECG showed sinus bradycardia. Patient mentioned he was waiting in a queue for a few minutes and had sweating and nausea before the episode. He had no prior significant medical history. What is the likely diagnosis?

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