25th June 2023

A 36-year-old woman came into resus with chest pain, palpitations, light-headedness and diaphoresis

A 36-year-old woman came into resus with chest pain, palpitations, light-headedness and diaphoresis. Her past medical history includes generalised tonic-clonic epilepsy, iron deficiency anaemia, and coeliac disease. Her medication history includes a new AED, which she cannot remember the name of, ferrous sulphate, and the progesterone-only pill.

Her ECG:

ECG

Her pulse is present. After stabilisation in resus, she is taken to the coronary care unit.

Which medication is most likely to cause this presentation?