The Pre- and Postoperative Prevalence and Risk Factors of ASA Nonresponse in Vascular Surgery.

Background: An antiplatelet therapy with acetylsalicylic acid (ASA) is prescribed in the prevention of cardiovascular events, but around 24% of ASA takers are resistant to the treatment.

Aim: In this prospective, observational cohort study, we aimed to identify the prevalence and risk factors of ASA nonresponse in patients who underwent vascular surgery.

Methods: The study was conducted in the University hospital in Frankfurt am Main.