27th July 2020

A 75-year-old man presents to his General Practitioner (GP) with left arm pain, associated with paraesthesia

A 75-year-old man presents to his General Practitioner (GP) with left arm pain, associated with paraesthesia. He reports that when he moves the affected arm, he often feels light-headed and has experienced double vision on occasion.  He has a past medical history of hypertension, diabetes mellitus type 2, and he is a life-long smoker. 

Given the likely diagnosis, which of the following investigations is the MOST definitive? 

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