The objective of this study is to assess the performance and safety of a formulation of the antiproliferative agent, sirolimus coated on modified Bx VELOCITY Balloon-Expandable Stent mounted on the Raptor Over The Wire (OTW) Stent Delivery System (SDS) in patients with de novo coronary artery lesions.

This is a single center, non-randomized study. Patients who meet the eligibility criteria will be treated with the sirolimus coated modified Bx VELOCITY Balloon-Expandable Stent mounted on the Raptor OTW SDS. Patients will be followed for five years post-procedure, with all patients having a repeat angiography at 6 months, 18 months, and 48 months.

Inclusion Criteria:

1. Diagnosis of angina pectoris as defined by Canadian Cardiovascular Society Classification (CCS) or a positive ischemia study;
2. Single de novo lesion requiring treatment in a major native coronary artery;
3. Target lesion is <=18mm in length (visual estimate);
4. Target lesion is >=3.0mm and <=3.5mm in diameter (visual estimate);
5. Target lesion stenosis is >50% and <100% (visual estimate);

Exclusion Criteria:

1. A Q-wave or non-Q-wave myocardial infarction within the preceding 72 hours unless the CK and CK-MB enzymes are back to normal;
2. Unprotected left main coronary disease with >=50% stenosis;
3. Have an ostial target lesion;
4. Angiographic evidence of thrombus within target lesion;
5. Calcified lesions which cannot be successfully predilated;
6. Ejection fraction <=30%;
7. Target lesion involves bifurcation (either stenosis of both main vessel and major branch or stenosis of just major branch);
8. Totally occluded vessel;