Transcatheter aortic valve replacement (TAVR) is a type of heart valve surgery. It's done to replace a narrowed aortic valve, a condition called aortic valve stenosis. A doctor inserts a soft tube called a catheter into a blood vessel and guides it into the heart. A replacement valve, called a biological valve, goes through the tube to the specific area in the heart. A balloon on the catheter tip inflates to press the new valve into place. Some valves expand on their own.
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