What is a stentless heart valve?
What is a stentless heart valve?
Stentless valves enrich the surgical armamentarium for the treatment of aortic valve pathology. They have advantages if implanted in special indications such as depressed left ventricular function, small aortic root or root disease, acute or chronic dissection or aneurysm formation.
What is the advantage of using a biological heart valve?
The crucial advantage of using biological valves—compared with valve replacements using mechanical prostheses—is the fact that continuous anticoagulation is not required. Another advantage for many patients is also the fact that biological valves do not produce any sounds.
What is a cadaver valve?
An autograft valve is one translocated from one position to another—for example, when the patient’s own pulmonary valve is used to replace a diseased aortic valve. A homograft (or allograft) valve is one transplanted from a human donor.
What is a Freestyle bioprosthesis?
The Freestyle™ bioprosthesis is indicated for the replacement of pathologic or prosthetic aortic valves, pulmonary valve replacement, and right ventricular outflow tract (RVOT) reconstruction.
Is the Ross procedure open heart surgery?
During the Ross open heart surgical procedure, the diseased aortic valve is removed and replaced with the patient’s biologic pulmonary valve. A second pulmonary valve, typically a homograft (human tissue) valve or occasionally an animal tissue valve, is then attached to function as a new pulmonary valve.
What are the disadvantages of using a cow tissue heart valve?
Disadvantages of cow tissue valve:
- made from cow so possible objections on religious grounds.
- new procedure so could be unknown risks.
- risks of using a stent, eg blood clots, stent breaking or valve tearing.
- not proven as a long term treatment.
- may be rejected.
How long does a bovine mitral valve last?
While new technologies are being designed and tested, cow valve replacements typically last between 10-20 years. The main advantage of mechanical valves is that they are very durable and expected to last the life of the patient.
Can you take eliquis with a pig valve?
Eliquis is approved only for use in people with AFib that is not caused by a heart valve problem. People with prosthetic heart valves should not take Eliquis.
How long does the Ross procedure last?
The length of stay for the Ross procedure group was 5.9 +/- 2.1 days, versus 8 +/- 1.85 days for the mechanical valve group (p < 0.01). The mean hospital costs were not significantly different, $23,140 +/- $7,825 for the mechanical valve group and $23,226 +/- $6,960 for the group having the Ross procedure.
What is the difference between a stentless and a heart valve?
Above you can see an example of the Medtronic Hancock® II heart valve replacement device which uses a stent. Alternatively, a stentless valve is often an actual heart valve taken from either a human donor (homograft) or a pig.
What is a stent in the heart?
A stent is used to support a replacement heart valve when positioned in the heart. Specifically, a stented tissue valve includes a frame (the stent) on which the valve is mounted. Ultimately, the stent supports the leaflet tissue (e.g. mitral valve leaflets) that opens-and-closes as blood flows through the heart.
Why are stentless valves used in small aortic annulus?
The lack of struts to support the leaflets allows for a greater effective orifice area. Stentless valves are often used in a small aortic annulus to avoid patient-prosthesis mismatch or in root replacement to treat aortic root aneurysm, dissection, or infection.
Are all stentless valves the same as allograft valves?
It should be noted that what are being marketed as stentless valves are not really stentless. The heterograft and allograft stentless valve both have stents, i.e., the biologic stents of the donor. They are stentless in the sense that neither has a rigid, mechanical stent.
