Artificial heart valves have steadily evolved since their arrival on the surgical scene in the 1960s. A range of the newest devices have shown significant potential, including the prospect of valve replacement in high-risk, symptomatic patients with severe aortic stenosis. What are the most promising devices on the horizon today, and how will these new tools allow us to care for populations with precarious cardiac function without conducting a major surgical procedure? Dr. Arvind Agnihotri, assistant professor of surgery at Harvard Medical School, explores the ways in which we are improving upon traditional aortic valve surgery with host Dr. Janet Wright.