Basically, you need nanometer scale medical procedures, which haven't been developed yet. So I offer the second best thing, herbal treatment.
The reference work is Left For Dead, I can't fully recall the Author's last name, only that his first name was Dick. His story was that triple bypass didn't do him much good, so he looked for alternative treatment. He found it in Cayenne Pepper, sometimes labelled Capsicum, and available in capsule form.
He suggested that capsicum acts like a roto-rooter in your circulatory system, clearing the accumulation that impedes the flow of blood. My wife claims that she can tell when she needs to take more of it by her sensitivity to restricted blood flow.
I can't tell for sure whether it's helping me, because I don't forget to take it for days at a time like her. I take two capsules daily, and along with vitamins E and C I think it is the minimum that anyone approaching middle age should do.
The biggest advantage to herbal and vitamin therapy is that they are unlikely to do any harm, as long as you don't get extreme with them. The biggest disadvantage is that they are slow acting, taking weeks to do what "miracle drugs" are supposed to do in hours. But if your problem is persistent, you'll have time to wait for the effect to happen.
Worst case, unless you have an extremely sensitive stomach, is that you'll only get better general circulation and a reduced likelihood of heart attack. And capsicum is cheap, about three bucks for a two-month supply. What's to lose?