17th August 2020

A 57-year-old woman presents to A&E with intermittent palpitations

A 57-year-old woman presents to A&E with intermittent palpitations. An ECG is performed, which shows a QTc of 484 milliseconds (normal < 470 milliseconds).

For the case above, please select the SINGLE most likely cause of the adverse reaction being described. Select ONE option from the list above.