Risk stratification for chest pain in the emergency department

What it is and when to use it

The HEART Score estimates the 6-week risk of major adverse cardiac events (MACE: myocardial infarction, revascularization, or death) in adult patients presenting to the emergency department with chest pain and suspected acute coronary syndrome. It sums points (0, 1, or 2 each) across five domains: History, ECG, Age, Risk factors, and Troponin, for a total range of 0 to 10. Developed by Six and Backus, it is one of the most extensively validated risk-stratification tools for undifferentiated chest pain in the emergency setting.

How to interpret it

The total score stratifies patients into three bands. Low risk (0-3 points): approximately 1-2% 6-week MACE risk, compatible with early discharge and outpatient management in many protocols. Moderate risk (4-6 points): intermediate risk (around 12-17%), warranting observation, serial troponins, and further testing. High risk (7-10 points): elevated risk (around 50-65%), favoring early invasive management and admission. Many modern protocols combine HEART with serial troponins (the HEART Pathway) to refine safe discharge decisions.

Limitations and when not to use it

Validated in adults with acute non-traumatic chest pain in the emergency department with suspected ACS; it should not be used in ST-elevation myocardial infarction (STEMI), hemodynamic instability, or an obvious non-cardiac cause, which require immediate action regardless of the score. It is not a diagnostic tool: it neither confirms nor excludes ACS on its own, does not assess non-coronary causes of chest pain (pulmonary embolism, aortic dissection, pneumothorax), and depends on clinical judgment and a reliable troponin assay. Apply it cautiously in young patients with atypical pain or when high-sensitivity troponin is interpreted using assay-specific thresholds.

Frequently asked questions

What does a low HEART Score of 0 to 3 mean?

It indicates a low 6-week MACE risk of roughly 1-2%, and in many protocols supports early discharge with outpatient follow-up, ideally after negative serial troponins.

What is the difference between the HEART Score and the HEART Pathway?

The HEART Score is the 0-to-10 points scale; the HEART Pathway adds a second serial troponin (e.g., at 0 and 3 hours) to more safely identify low-risk patients suitable for discharge.

Can the HEART Score rule out a heart attack?

Not on its own. It is a risk-stratification tool, not a diagnostic test; a low score lowers the probability of MACE but does not exclude ACS, and it must always be combined with troponins and clinical judgment.