18th January 2024

A 68-year-old male with a past medical history of ischaemic stroke, atrial fibrillation and diabetes presents with a one-week history of right-sided headache and scalp tenderness.

A 68-year-old male with a past medical history of ischaemic stroke, atrial fibrillation and diabetes presents with a one-week history of right-sided headache and scalp tenderness. He is extremely fatigued. He reports some flashers and floaters in the right side of his visual field for the last few days.

Given the most likely diagnosis, what is the most important next step?

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