Drug-coated stents prevent arteries from re-closing better than the traditional, bare-metal kind--and right now Boston Scientific's drug-coated Taxus stent owns 60% of the stent market.

FORBES: JNJ-Guidant Vs. Boston-Scientific-St. Jude

They may opt for a bare metal stent to prop up a second vessel, or substitute the more expensive anti-coagulants, such as Millennium Pharmaceuticals' (nasdaq: MLNM - news - people ) Integrilin, or Eli Lilly's (nyse: LLY - news - people ) ReoPro, with cheaper ones.

FORBES: Boston Scientific Close On J&J's Heels With New Stent