Why?

So, Andreas, for years, I mean, we've conquered to use the word loosely, aortic stenosis with the use of transcatheter techniques and TAVR.

But along the way, we did have patients who had aortic regurgitation, but there were no dedicated devices.

We struggled with devices in these patients.

These devices were designed for calcific aortic stenosis.

And the outcomes here were not perfect.

They were actually less than ideal.

But there is a lot of symptomatic patients out there that are very high risk or no surgical candidates and in these patients you tested a dedicated device.