By SAM TONKIN FOR MAILONLINE PUBLISHED: 07:16 EDT, 26 May 2021 | UPDATED: 07:16 EDT, 26 May 2021 A simple thumb test could be used to identify people at risk of a condition that can kill in minutes and has no symptoms. It will indicate if a person is harbouring an aortic aneurysm — an abnormal bulge in the wall of the...