Glossary of Terms

Below is a glossary of frequently used terms that relate to Boston Scientific's products and related procedures.

Lesion Length

Length of the lesion, as measured from end-to-end by a core laboratory.

Lumen

The hollow space inside a blood vessel through which the blood flows.

Major Adverse Cardiac Events (MACE)

Cardiac death, myocardial infarction (MI) including Q- and non Q-wave MI, and target vessel revascularization (TVR).

Myocardial Infarction (MI)

Permanent damage to the heart tissue and muscle due to the interruption of the blood supply to the area. Commonly referred to as a heart attack.

Occlusion

The act of closing or the state of being closed.

Polymer

A carrier that provides uniform drug coverage along the stent, enables time-released dosing and is vascular compatible.

Post-Dilatation

After a stent has been expanded, another balloon catheter may be inserted inside the stent and inflated to size the stent more precisely to the vessel wall.

Pre-Dilatation

The use of a balloon catheter to dilate a coronary lesion prior to placement of the coronary stent. This procedure provides the physician access for the stent delivery system as well as aiding in selection of stent size.

Restenosis

The growth of neointimal tissue within an artery after angioplasty and stenting.

Stent

An expandable metal tube that supports the vessel wall and maintains blood flow through the opened vessel.

Target Lesion Revascularization (TLR)

A repeat percutaneous intervention of the target lesion or bypass surgery of the target vessel involving the target lesion.

Target Vessel Revascularization (TVR)

A repeat percutaneous intervention of the target vessel or bypass surgery of the target vessel.

Thrombus

Blood clot.

Vessel

A vein or artery.

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