Artificial heart valve testing in goats.

Area of Science:

• Cardiovascular Surgery
• Biomaterials Science

Background:

• Mitral valve replacement is a critical procedure.
• The Björk-Shiley monostrut valve is a prosthetic device used in cardiac surgery.
• Modified valve surfaces may improve biocompatibility and reduce complications.

Purpose of the Study:

• To evaluate the long-term efficacy and safety of a modified Björk-Shiley monostrut valve in the mitral position.
• To assess the feasibility of mitral valve replacement without anticoagulation in a large animal model.

Main Methods:

• The modified Björk-Shiley monostrut valve was implanted in the mitral position in 72 goats.
• A meticulous surgical technique involving isolated sutures was employed in a beating heart under normothermia.
• Postoperative care involved free-range living on a farm.

Main Results:

• The study achieved consecutive long-term survival of goats up to one year post-implantation.
• No anticoagulation was required for the surviving animals.
• One goat successfully gave birth to two offspring six months after valve replacement, indicating good physiological tolerance.

Conclusions:

• The modified Björk-Shiley monostrut valve demonstrates successful short-term outcomes in mitral position in goats without anticoagulation.
• Further hemodynamic assessments and explant analyses are essential to determine the valve's broader clinical applicability.