May 7, 2007 — Citing issues related to potentially suboptimal therapeutic dosing of paclitaxel, Conor Medsystems, LLC, has concluded that the COSTAR II (CObalt Chromium STent with Antiproliferative for Restenosis) trial, the pivotal study for the CoStar(R) cobalt chromium paclitaxel-eluting coronary stent, failed to meet its primary endpoint. The trial did not identify safety issues, and the overall rates of death, myocardial infarction and stent thrombosis were consistent with those observed in other clinically relevant drug-eluting stent studies.