The main objective of this study is to assess the safety and effectiveness of the sirolimus-coated Bx VELOCITYTM stent in reducing target vessel failure in de novo native coronary artery lesions as compared to the uncoated Bx VELOCITYTM balloon-expandable stent. Both stents are mounted on the Raptorâ over-the-wire (OTW) Stent Delivery System.

This is a multicenter (55 sites), prospective, 2-arm randomized, double-blind study designed to assess the safety and effectiveness of the sirolimus-coated Bx VELOCITYTM stent as compared to the uncoated Bx VELOCITYTM stent. A total of 1100 patients will be entered in the study and will be randomized on a 1:1 basis. Patients with de novo native coronary artery lesions >/=15mm and </=30mm in length and >/=2.50mm to \

Inclusion Criteria:

1. Male or non-pregnant female patients minimum 18 years of age
2. Diagnosis of angina pectoris as defined by Canadian Cardiovascular Society Classification (CCS I, II, III, IV) OR unstable angina pectoris (Braunwald Classification B&C, I-II) OR patients with documented silent ischemia;
3. Target lesion is 2.50mm and 3.5mm in diameter (visual estimate);
4. Target lesion is 15mm and 30mm in length (visual estimate);
5. Target lesion stenosis is >50% and <100% (visual estimate);

Exclusion Criteria:

1. Patient has experienced a Q-wave or non-Q-wave myocardial infarction with documented total CK >2 times normal within the preceding 24 hours and the CK and CK-MB enzymes remains above normal at the time of treatment;
2. Has unstable angina classified as Braunwald III B or C, or is having a peri infarction;
3. Documented Left ventricular ejection fraction 25%;
4. Impaired renal function (creatinine > 3.0 mg/dl) at the time of treatment;
5. Target lesion involves bifurcation including a diseased side branch 2.5mm in diameter (either stenosis of both main vessel and major branch or stenosis of just major branch) that would require treatment;