Artificial Heart Valves

2 posts / 0 new
Last post
Guy Sovak
Guy Sovak's picture
Artificial Heart Valves
Tony Rook
Tony Rook's picture
Thanks for links guy!

Thanks for links guy!

Here is some additional information that I found within these links...

Heart Valve Products

Heart Valve Replacement Products
Today, two types of prosthetic valves are used for valve replacement: mechanical or tissue. Mechanical heart valves, made from man-made materials, are very durable and should last a lifetime for a valve recipient who is under a physician's care. To prevent blood clots from developing on the valve, which can cause complications, a mechanical valve replacement requires that the recipient take anticoagulation medicine (blood thinner) daily for his or her lifetime.

Tissue valves, composed of natural tissue, typically do not require lifelong blood thinners because the tissue used is naturally biocompatible. Typically, tissue valves do not last as long as mechanical valves.

Mechanical Valves

The St. Jude Medical mechanical heart valve is the gold standard of mechanical valves. Our valve is the most widely implanted heart valve in the world. The valve has a ring that supports two leaflets, which open and close like natural heart valve leaflets to regulate blood flow through the heart.

The leaflets and ring of the St. Jude Medical mechanical heart valve are made of graphite and coated with pyrolytic carbon. A black substance much like a diamond, pyrolytic carbon was chosen for the coating because of its hardness, strength, durability, and because it is hard for blood components to stick to the valve. The outer edge of the ring has a polyester (material) cuff that the surgeon uses to sew the valve to the heart tissue surrounding the valve.

Because no two patients are the same size, St. Jude Medical mechanical heart valves are available in different diameters to fit a variety of patient sizes.

Tissue Valves

A tissue valve, also known as a xenograft, is a natural tissue or biological valve that has been taken from an animal heart. After the valve is removed, it is treated to make the tissue stronger and prevent the recipient from rejecting the tissue. A thin polyester mesh cuff is placed around the outside of the valve to make it easier to sew the valve into the recipient's heart.

Some tissue valves have a frame, or stent, that supports the valve, and some valves are stentless. This means that instead of the supporting frame, the valve recipient's natural wall (aortic wall) acts as the stent.

Repair Products

Sometimes when repairing the annulus, it is necessary for the surgeon to implant an annuloplasty ring. A ring is used to correct a problem, provide support for the valve, and reinforce other repair techniques that were performed.

Reference Link - St Jude Medical Heart Valve Products