The FDA initially green-lighted Medtronic's CoreValve system for severe aortic stenosis patients who are too sick to undergo open heart surgery but it now extended its approval to include healthier patients with high risk for the standard treatment.
The FDA initially green-lighted Medtronic's CoreValve system for severe aortic stenosis patients who are too sick to undergo open heart surgery but it now extended its approval to include healthier patients with high risk for the standard treatment.