5th May 2025

A 32-year-old lady presents to the emergency department with a syncopal episode after a two-day history of vomiting and diarrhoea.

A 32-year-old lady presents to the emergency department with a syncopal episode after a two-day history of vomiting and diarrhoea. An ECG confirms the presence of a narrow-complex tachycardia with a rate of 200bpm. She has no significant past medical history. Her BP is 70/40, she is tachypnoeic and appears to be tiring. What is the most appropriate initial management for this lady?

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