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In that context, the new generation aortic mechanical valve (On-X) offers a potential lifetime solution without need for a repeat operation, while minimizing the risks of long-term anticoagulation due to reduced anticoagulation target INR of 1.5 to 2.0.
Valve sparing aortic root replacement (VSARR) is an alternative procedure to the composite aortic valve graft (CAGVR, Bentall procedure). A notable benefit of VSARR is the reduced need for anticoagulation, as the patient's own aortic valve is spared and does not need to be replaced with a mechanical or bioprosthetic valve. [11]
Tissue valves are less durable than mechanical valves, typically lasting 10–20 years. [20] This means that people with bioprosthetic valves have a higher incidence of requiring another aortic valve replacement in their lifetime. [16] Bioprosthetic valves tend to deteriorate more quickly in younger patients. [21]
The durability of homograft valves is probably the same as for porcine tissue valves. Another procedure for aortic valve replacement is the Ross procedure (after Donald Ross) or pulmonary autograft. The Ross procedure involves going to surgery to have the aortic valve removed and replacing it with the patient's own pulmonary valve.
Contrary to valve replacement with mechanical prostheses inhibition of the blood clotting system (anticoagulation) is not necessary after aortic valve repair. Blood-thinning may only be necessary if atrial fibrillation occurs or persists in order to prevent blood clot formation in the left atrium.
Björk–Shiley valve, as depicted in patent #US003824629. The Björk–Shiley valve is a mechanical artificial heart valve. The valve was co-invented by American engineer Donald Shiley and Swedish heart surgeon Viking Björk. Beginning in 1971, it has been used to replace aortic valves and mitral valves. It was the first successful tilting ...
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