It has been known that although tissue valves have lower rates of thrombotic episodescompared with mechanical valves, they are difficult to procure, and their longevity has not yet been proven. Is this true as of 2007? Thanks for answering.
It is not true that tissue valves are difficult to procure--they are widely available from several manufacturers worldwide. Traditional wisdom has long held that tissue valves are for the elderly, but with the use of third generation tissue valves, which are treated to prevent calcification, in the hands of a top surgeon in a high-volume center, the choice is not so cut-and-dried anymore. Many top surgeons believe the newer tissue (porcine or bovine pericardial) valves will last twenty-five years or more (although, admittedly, they have not been studied long enough to prove this). Many top surgeons recommend the tissue valves in all but the mitral position for their patients in their 40's or even younger, believing that the risks of life-long anticoagulation therapy (which is required if one has a mechanical valve) can be greater than the risks involved in a second open heart surgery for valve replacement for some patients. What it comes down to is that valve choice is a highly individual matter--what may be the right choice for one patient of any given age may not be the right choice for another person of the same age. The following links are invaluable for making this very important decision. Do remember, whatever valve is chosen, the surgery will prolong life for the needy recipient. Whatever the choice, the patient should make it and never look back!
Tissue valves do last as long as mechanical valves in most cases. Most of those are porcine valves, and some are bovine. The majority of those are used to replace the aortic valve. The mitral is almost always replaced with a mechanical valve.
Aortic valve alternative is a surgery wherein a affected person's aortic valve is replaced by a distinctive valve. The aortic valve could properly be stricken by a extensive selection illnesses and require aortic valve alternative. The valve can the two grow to be leaky (regurgitant or inadequate) or caught partly close (stenotic). Aortic valve alternative presently demands open heart surgical operation. learn is being achieved now directly to advance valves that is implanted utilising a catheter without open heart surgical operation. There are 2 uncomplicated varieties of synthetic heart valve, mechanical valves and tissue valves. Tissue heart valves are many times produced from animal tissues, the two animal heart valve tissue or animal pericardial tissue. The tissue is dealt with to avert rejection and to avert calcification. there are possibilities to animal tissue valves. on occasion a human aortic valve could properly be implanted. those are stated as homografts. Homograft valves are donated by sufferers and harvested after the affected person expires. the sturdiness of homograft valves is probable the comparable for porcine tissue valves. yet another technique for aortic valve alternative is the Ross technique or pulmonary autograft. The Ross technique includes going to surgical operation to have the aortic valve bumped off and changing it with the affected person's own pulmonary valve. A pulmonary homograft (a pulmonary valve taken from a cadaver) is then used to swap the sufferers own pulmonary valve. Mitral regurgitation (MR), additionally conventional as mitral insufficiency, is the strange leaking of blood interior the path of the mitral valve, from the left ventricle into the left atrium of the middle.
I was told that the type of replacement you get often relates to your life expectancy. This is because while medical teams say they will replace a replacement once you have had the surgery you will realize its not a choice to make if there is any other option. They remove the hart and fix it up and put it back in its no fun. If you have a chance of outlasting your tissue valve get a baked carbon valve and join carbonvalvers.
