Stenosis
The narrowing or constriction of an opening, such as a blood vessel or heart valve.
Cardiac
Stent
A device made of expandable, metal mesh that is placed (by using a balloon catheter) at the site of a narrowing artery. The stent is then expanded and left in place to keep the artery open.
ST-segment-elevation myocardial infarction [STEMI]
The more severe form of the 2 types of heart attack. See also NSTEMI. A STEMI produces a characteristic elevation in the ST segment on an electrocardiogram