He got a new valve and was back home two weeks later.

There is also a risk that the new valve will stop working and need to be replaced.

You may need to take medicine and monitor the new valve for problems throughout your recovery.

And you also increase the chance that you will need another new valve in the future.

When doctors could not locate a new valve, she took over and began to call her network of friends.

She would gain less energy, less benefit from her new valve.

With the new valve, he was better - for a while.

Unable to find the problem, the suppliers simply had to remove the new valves and put the old ones back.

Many others survived only a few days or months, even though the new valve was functioning.

The head casting was changed to accommodate different mounting surface of the new valve.