Inclusion Criteria:  Age 18-85 years old Angiographically confirmed coronary artery ectasia or aneurysm (Arm I) Abdominal aortic aneurysm (Arm II) Angiographically confirmed coronary artery disease (Arm III)  Exclusion Criteria:  Less than 12 months from ACS Actual oral anticoagulant therapy Actual antiplatelet therapy other than aspirin Heart failure NYHA IV Untreated hyperthyroidism or hypothyroidism Severe comorbidities Lack of consent