Cusp Nadir Relocation by Root Remodeling in Unicuspid Aortic Valve Repair

Area of Science:

• Cardiovascular Surgery
• Biomedical Engineering
• Cardiac Valve Repair

Background:

• Unicuspid aortic valves with hypoplastic anterior commissures present surgical challenges.
• Current techniques may involve complex reconstructions or prosthetic replacements.
• Symmetric bicuspidization aims to improve valve function and hemodynamics.

Purpose of the Study:

• To present a novel root remodeling technique for unicuspid/unicommissural aortic valves.
• To achieve symmetric bicuspidization without cusp patch insertion.
• To evaluate the feasibility of this technique in select patients.

Main Methods:

• Dividing partial cusp fusion of the anterior commissure.
• Suturing symmetric Dacron graft tongues to cusp insertion lines.
• Posterior relocation of cusp nadirs and creation of a new basal ring.
• Incorporating annuloplasty and prolapse correction based on effective height.

Main Results:

• Successful symmetric bicuspidization of the aortic valve.
• Avoidance of patch insertion to the native valve cusps.
• Creation of two high commissures from an angulated virtual basal ring.
• Optimized valve configuration through additional corrective procedures.

Conclusions:

• The described root remodeling technique effectively achieves aortic valve bicuspidization.
• This method offers a viable alternative for specific unicuspid aortic valve cases.
• Further evaluation is warranted to confirm long-term outcomes in select patient populations.