From the AHZ website:"CardioCel® is a new type of cardiovascular...

From the AHZ website:
"CardioCel® is a new type of cardiovascular scaffold that can be used to repair congenital heart deformities and more complex heart defects."

"The CardioCel® scaffold also has the potential to be used in the repair and reconstruction of dysfunctional heart valves and valve leaflets, with longer term possibilities for use in the manufacture of replacement tissue heart valves."

So from my understanding, AHZ has a patch that repairs heart defects, whereas the Ring is for repairing leaking mitral valves. Looks promising, but because its only approved for compassionate use outside of the EU, it will be some years before it makes a positive contribution to SBN's bottom line. It will be vbery interesting to read further announcements on this.