4th May 2025

A 76-year-old female presents to ED via ambulance with palpitations and breathlessness.

A 76-year-old female presents to ED via ambulance with palpitations and breathlessness. She has a history of NSTEMI and has had successful PCI in the past. The ambulance crew has you a rhythm strip which shows as below. Her heart rate is 165 bpm and a blood pressure of 140/70mmHg. She has no chest pain; no syncope and her lung bases are clear on auscultation.

Given her most likely rhythm, what is the next appropriate therapy in this case?

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