My wife had an Endarterectomy on her right carotid artery in Oct 2007, in April 2008 it was 99% blocked and she had a stent inserted, that was in early May. Now in Aug 2008 she has blockage once again developing above the stent, 80% or more blocked. She is taking Plavix, Lovastatin and an aspirin every day. The doctor says he may have to insert another stent above the first to correct the problem. What happens if it closes up again, how many stents can they do and is there another medicinal therapy she should be looking at to combat this progressive disease?