New 20-year data show a survival rate of 90% with few repeat surgeries after this complex operation that can only be ...

Middle-aged adults who need an aortic valve replacement fare better with mechanical devices than with the valves made from animal tissues that they currently most often receive, U.S. researchers ...

These latest data reinforce years of smaller studies, but whether they should change practice is a matter of debate.

At baseline, the mechanical valve group tended to be younger (55.7 vs 65.2) and had less aortic stenois (82.4% vs 89.5%), but ...