ABSTRACT
A 46-year-old man presented to the emergency department complaining of intermittent episodes of shortness of breath and palpitations. The episodes started around 4 months earlier but were now becoming more frequent. He denied chest pain and had not identified any exacerbating factors. He had been diagnosed with type 2 diabetes mellitus 2 years ago and had successfully managed this with lifestyle modifications. He took regular gliclazide. He lived with his partner and worked as a labourer on a building site.
