Your HEART score ranges from 0 to 10 and stratifies your risk of a major adverse cardiac event (MACE) — including myocardial infarction, need for revascularization, or death — within 6 weeks of presentation. A score of 0–3 is low risk, with a MACE rate of approximately 0.9–1.7%. A score of 4–6 is moderate risk, with a MACE rate of 12–16.6%. A score of 7–10 is high risk, with a MACE rate of 50–65%.

Low-risk patients (0–3) may be candidates for early discharge from the emergency department after appropriate evaluation, potentially avoiding unnecessary hospital admissions and invasive testing. Moderate-risk patients typically require observation, serial troponins, and further cardiac workup. High-risk patients should be considered for early invasive strategies such as cardiac catheterization.

Use this calculator in the emergency department when evaluating adult patients presenting with chest pain or symptoms suspicious for acute coronary syndrome (ACS). It is designed to be applied early in the evaluation — after the initial history, ECG, and first troponin result are available — to guide disposition decisions.

The HEART score is particularly valuable for identifying the large proportion of chest pain patients who are at low risk and may be safely discharged, reducing unnecessary admissions, stress testing, and healthcare costs. It is now incorporated into clinical pathways at many hospitals as part of standardized chest pain evaluation protocols.

The HEART score includes a subjective component — the History element requires clinical judgment to classify the presentation as slightly, moderately, or highly suspicious for ACS. This introduces inter-rater variability, and less experienced clinicians may score this component differently than cardiologists or experienced emergency physicians.

The score was developed and primarily validated in emergency department populations and should not be applied to patients with clear STEMI (ST-elevation myocardial infarction), who require immediate intervention regardless of score. It also does not account for certain high-risk features such as hemodynamic instability, new heart failure, or sustained ventricular arrhythmias, which may warrant aggressive management even with a lower HEART score. Finally, while a score of 0–3 carries a low MACE rate, it is not zero — clinical judgment and patient-specific factors should always supplement the score.