When coronary artery stents are used in
heart attacks as a primary form of treatment (without prior use
of "clot buster" medications), the success rate is >95%
with less than 1% (0.8%) death rate within the hospitalization period.
Studies have shown that the restenosis
(recurrance of blockage at the same site) rate was around 25% during
a 7 month follow-up period.