Differences between valve types in anatomic changes of the aortic root after surgical aortic valve replacement

Area of Science:

• Cardiovascular Surgery
• Interventional Cardiology
• Radiology

Background:

• Estimating coronary obstruction risk is crucial for future transcatheter aortic valve-in-surgical aortic valve (TAV-in-SAV) procedures after initial surgical aortic valve replacement (SAVR).
• Understanding anatomic changes in the aortic root post-SAVR is essential for planning secondary interventions.

Purpose of the Study:

• To investigate aortic root anatomic changes after SAVR.
• To compare these changes between different bioprosthetic valve types (sutured vs. rapid-deployment/sutureless).
• To evaluate implications for future TAV-in-SAV feasibility.

Main Methods:

• Retrospective analysis of pre- and post-SAVR computed tomography scans from 124 patients with aortic stenosis.
• Comparison of postoperative aortic root dimensions and coronary access parameters between sutured and rapid-deployment/sutureless valve groups.

Main Results:

• SAVR led to decreased coronary height and sinus of Valsalva (SOV) diameter in both groups, with greater reductions in the sutured valve group.
• The rapid-deployment/sutureless valve group showed better preservation of aortic root structure and a higher proportion of coronary orifices above the risk plane.
• Valve-to-coronary and valve-to-aorta distances were generally adequate, with differences noted primarily in left VTA.

Conclusions:

• SAVR alters aortic root anatomy, particularly with sutured valves, potentially impacting future TAV-in-SAV.
• Rapid-deployment/sutureless valves appear to preserve aortic root structure more effectively post-SAVR.
• These findings are critical for assessing the feasibility of TAV-in-SAV following initial SAVR.