Transcatheter Aortic Valve Implantation, or TAVI for short, is performed to replace a faulty aortic valve in the heart. When the aortic valve doesn't work properly, the heart has to work harder to pump blood into the aorta, which pumps oxygenated blood to the rest of the body. Go inside the body to see how this surgery is performed.

Sponsored by Medtronic - for more information click here. Animation produced by Visible Productions Inc.

Want to know how to look marvelous without splurging so much? Dr. Oz invites three beauty experts to share the smartest ways to save money while looking fabulous starting from your hair and makeup tools to the beauty products you use.