Other device-makers are working on developing their own valves. And a heart surgeon at the University of Maryland Medical Center in Baltimore says he thinks that bypassing the diseased valve could be a better way to go.
In the journal Circulation last month, surgeon James S. Gammie reported that using a new valve embedded in a bypass graft "reliably relieves aortic stenosis," or narrowing of the valve.
Gammie said he did not need FDA approval because he was using approved devices.