[Aortic valve replacement with stentless bioprosthesis: operative methods and pitfalls]

Area of Science:

• Cardiovascular Surgery
• Prosthetic Valve Design
• Surgical Techniques

Background:

• Aortic valve replacement (AVR) is a critical procedure for severe aortic valve disease.
• Standard AVR techniques require meticulous attention to detail to minimize complications.
• The use of specific prostheses like Toronto SPV and Freestyle necessitates understanding their unique implantation requirements.

Purpose of the Study:

• To describe the operative methods for aortic valve replacement using Toronto SPV and Freestyle prostheses.
• To identify potential pitfalls and critical steps in these AVR procedures.
• To share insights from a series of 24 consecutive cases.

Main Methods:

• Detailed description of standard operative techniques for AVR.
• Emphasis on precise transverse aortotomy, inflow suture line placement, and outflow suture positioning.
• Specific considerations for managing bicuspid aortic valves and their anomalous coronary orifices.
• Review of 24 consecutive AVR cases utilizing Toronto SPV and Freestyle prostheses.

Main Results:

• Successful implantation of Toronto SPV and Freestyle prostheses was achieved in 24 cases.
• Key procedural elements for success include precise aortotomy and suture line placement.
• Potential for prosthesis oversizing was observed with stentless bioprostheses.
• Anomalies of coronary orifices in bicuspid valves require careful surgical management.

Conclusions:

• Standard AVR with Toronto SPV and Freestyle prostheses can be performed successfully with meticulous technique.
• Awareness of coronary orifice anomalies in bicuspid valves is essential.
• Oversizing may be a consideration when using stentless bioprostheses in AVR.