Study questions whether stents relieve chest pain

A new study questions whether the hundreds of thousands of Americans who choose to implant stents to relieve chest pain will feel any benefits. The study, published by The Lancet, found that while the mesh wire did improve blood flow, patients were still hurting. Dr. Ajay Kirtane, director of Cardiac Catheterization Laboratories at Columbia University Medical Center, joins Hari Sreenivasan.