Since 1989, the Agency for Health Care Policy and Research (AHCPR, now called the Agency for Healthcare Research and Quality), has supported over 200 studies on treatments for problems related to heart attack (also called myocardial infarction, or MI). Findings from AHRQ-funded research have led to changes by practitioners and other health system leaders in all aspects of care for patients with chest pain, confirmed heart attacks, and coronary artery disease.