I wouldn't say a blind eye. I think there has been an incredible amount of pressure generated within the system that says you have to do a controlled double-blind study to see if it's effective, just as you would for a new drug coming out.
The difference is it's not a new drug. It's not a new procedure. It's not new anything. Hundreds of thousands of angioplasties have been done since Gruentzig introduced the procedure in 1984.