Interesting article from 2013.
Data from a new analysis of Medtronic's (NYSE: MDT) RESOLUTE global drug-eluting stent program show very low occurrence of stent thrombosis when dual antiplatelet therapy (DAPT) is interrupted or discontinued after one month.
http://www.ptca.org/news/2013/0314_MEDT ... OLUTE.html
In Oceania Clopidogrel in only administered for 6 months, whereas in USA its 12 months. Auckland cardiology mention the potential of up to 5% risk of restenosis.