Heart attack is defined as an occurrence of coronary thrombosis (a blockage of blood flow to the heart). A heart attack happens in the United States every 30 seconds. Of these events, more than two thirds are first time events while nearly 30% occur in people who have already suffered a heart attack in the past.
Stent are used to prevent such events. A stent is a tubular support that is placed inside a vessel to promote healing or restore blood flow through an obstruction. Every year, more than 500,000 Americans receive coronary stents.