Boston Scientific Corporation (abbreviated BSC), is a worldwide developer, manufacturer and marketer of medical devices whose products are used in a range of interventional medical specialties, including interventional cardiology, peripheral interventions, neuromodulation, neurovascular intervention, electrophysiology, cardiac surgery, vascular surgery, endoscopy, oncology, urology and gynecology.

Boston Scientific is well known for the development of the Taxus Stent, a drug-eluting stent which is used to open clogged arteries.

Boston Scientific's main competitors are Johnson & Johnson, Medtronic, and St. Jude Medical.  Wikipedia