Prospective Evaluation of Adventitial Histopathology in Borderline Ascending Aortic Dilatatio

This prospective study investigates microscopic changes in the outer layer (adventitia) of the ascending aorta in patients undergoing coronary artery bypass grafting (CABG) surgery. The study includes two groups of patients: (1) those with borderline ascending aortic dilatation (4.0-5.0 cm), and (2) a control group with normal aortic diameter (\<4.0 cm), all undergoing the same surgical procedure. During CABG, a small circular punch is routinely made in the ascending aorta for the proximal saphenous vein graft anastomosis. The tissue removed from this punch site is collected and used for histopathological and immunohistochemical analysis. The study aims to determine whether adventitial changes correlate with aortic size and whether these changes can help identify patients at risk for future aortic dissection or rupture. The findings may guide surgical decision-making in patients with borderline aortic enlargement.

NCT Number	NCT07034586
Lead Sponsor	Samsun University
Conditions	Ascending Aortic Aneurysm, Aortic Adventitial Pathology, Coronary Artery Bypass Grafting (CABG), Borderline Aortic Dilatation
Enrollment	102 participants
Start Date	2023-08-01
Primary Completion	2025-08-01 (estimated)
Study Completion	2025-09-01 (estimated)
Updated on ClinicalTrials.gov	2025-06-24