In October 2007 an update of the definition of myocardial infarction was published in several scientific journals. The updated definition was published in a consensus report made by a task force on behalf of ESC (European Society of Cardiology), ACCF (American College of Cardiology Foundation), AHA (American Heart Association) and WHF World Heart Federation).

In the new definition the use of cardiac biomarkers, preferably troponin, is still central in the diagnosis of myocardial infarction, together with ECG and patient history. An elevation of troponin (or another cardiac biomarker) combined with at least one of the following: ECG changes, imaging evidence or ischemia symptoms meet the criteria for a diagnosis of myocardial infarction.

The classifications and updates contained within the definition are expected to improve patient outcomes. A patient, who might earlier have been classified as having unstable angina, might now be classified as having a myocardial infarction and therefore receive more aggressive treatment, which might decrease mortality.

Selected quotes, which emphasize the importance of cardiac biomarker tests, are presented.