I do not have any evidence of improvement. Would I be in poorer shape without the procedure? I don't know. After I see the doc later this month maybe I'll have an idea if there has been improvement or not. I do get short of breath without much activity so from that standpoint I don't see much relief. I am approaching my 80th birthday so I guess I should expect to see some difference in my endurance as compared to a few years ago. I am happy to be active and able to care for the yard and work everyday at our greenhouse business. PTL