25th May 2025

A 36-year-old banker presents to ED with an irregular tachyarrhythmia.

A 36-year-old banker presents to ED with an irregular tachyarrhythmia. The ECG shows broad QRS complexes running at 200 bpm with rates of 300 bpm in places with subtle variation in the QRS width. There is a dominant S wave in V1.  Her blood pressure is 135/86 mmHg and she has no chest pain, dyspnoea or syncopal features. She is treated for AF with WPW and returns to sinus rhythm. However, she begins to complain of dizziness and blurry vision. What medication was used to manage her presentation?

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