MEDICAL ANIMATION TRANSCRIPT: If you have a severe problem with the aortic valve in your heart, your doctor may recommend a transcatheter aortic valve implantation, or TAVI. It's also known as transcatheter aortic valve replacement, or TAVR. Your aortic valve is one of the four valves in your heart. It lies between your left ventricle, or lower left chamber, and the large blood vessel supplying oxygen rich blood to your body, called the aorta. When your left ventricle contracts during each heartbeat, it pushes blood through three flexible cup-like leaflets that make up your aortic valve. When your left ventricle relaxes, your aortic valve closes to prevent blood from flowing back into your left ventricle. As you get older, your aortic valve may develop deposits of calcium that cause your leaflets to get thicker and less flexible. In this condition, your leaflets may not open fully. This condition, called calcific aortic valve stenosis, creates a narrowed opening that reduces the amoun...