25th May 2025

A 53-year-old man with a previous lacunar stroke presents to A&E with sudden onset chest pain and shortness of breath.

A 53-year-old man with a previous lacunar stroke presents to A&E with sudden onset chest pain and shortness of breath. He has a 20-pack-year smoking history. You are asked to assess him while one of your colleagues is requesting some investigations for the patient. Which of the following blood results could help rule out aortic dissection?

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