The goal of this observational study is to study arterial stiffness in patients with thoracic ascending aortic aneurysms (TAA), either syndromic or non-syndromic. The main questions it aims to answer are: * Stratification of aortic risk based on arterial stiffness; Compare measurements with morphological and haemodynamic features of the ascending thoracic aorta. Participants will be asked to undergo non-invasive evaluation of blood pressure and arterial stiffness.