Emergency and Critical Care

HEART Score for Chest Pain Risk Stratification

Q: HEART vs TIMI: which is more accurate?

In the emergency department, HEART is more accurate overall in combining sensitivity and specificity. TIMI was developed for patients with already confirmed ACS, not for triage.

Q: Can a patient with a HEART score of 3 be discharged?

Yes, if troponin is negative at two time points (0 and 3 hours) and there are no acute ECG changes. A scheduled cardiology follow-up within 72 hours is required.

Q: What counts as a 'moderately typical' history?

Pain with a typical location that does not meet all criteria for angina: the exertional pattern is not clear, or radiation is atypical, or autonomic symptoms are mixed.

Q: Is the score applicable to young patients under 45?

Yes. The age component scores 0, which combined with a negative ECG and troponin reliably places the patient in the low-risk category.

Risk stratification for chest pain in the emergency department

Primary source: Six AJ et al. Neth Heart J 2008; 16(6): 191-196

Aleksandr A. Aulov, MD, internal medicine Last clinical review: April 28, 2026

Online calculation

History

ECG

Age

Risk factors

Hypertension, diabetes, hypercholesterolemia, obesity, smoking, family history of CAD

Troponin

About this score

The HEART Score (Six AJ et al., Crit Pathw Cardiol, 2008) is a clinical risk score for major adverse cardiac events (MACE: acute myocardial infarction, revascularization, death) within 6 weeks in patients presenting with chest pain to the emergency department. The acronym stands for History, ECG, Age, Risk factors, and Troponin.

Each component scores 0-2 points, for a total of 0-10. Low risk (0-3 points, MACE 0.9-1.7%) allows discharge from the emergency department with outpatient follow-up. Intermediate risk (4-6, MACE 12-16.6%) requires admission or 24-hour observation. High risk (7-10, MACE 50-65%) warrants immediate cardiology intervention.

The score has been validated in large European and American cohorts. It outperforms TIMI and GRACE in the emergency department setting by combining sensitivity with simplicity. It is used as part of a rapid rule-out strategy when ACS is suspected.

When to use

Patient with acute chest pain in the emergency department.
Decision on early discharge (< 24 hours) when ACS is suspected.
Risk stratification before stress testing and invasive coronary angiography.
Documenting the clinical rationale for patient disposition (home / ward / ICU).

Clinical example

Case

A 62-year-old man presents with 4 hours of burning retrosternal pain radiating to the left arm, worsened by exertion. ECG shows 1 mm ST depression in V4-V6. High-sensitivity troponin is 1.5× the 99th percentile. History: hypertension, diabetes, father had MI at age 55.

Calculation

History (moderately typical, 1) + ECG (1 mm ST depression, 2) + Age (45-64, 1) + Risk factors (≥ 3: hypertension, diabetes, family history, 2) + Troponin (1-3× ULN, 1) = 7 points.

Interpretation and management

High risk (MACE up to 50% at 6 weeks). Admission to the cardiac care unit, initiation of dual antiplatelet therapy and anticoagulation per ACS protocol, and urgent coronary angiography within 24 hours (NSTEMI with very-high-risk features).

Limitations and cautions

Not applicable to patients with overt STEMI on ECG, who require immediate reperfusion regardless of the score.
Sensitivity depends on the quality of the troponin assay; high-sensitivity troponin is preferred.
Age categories are coarse; patients aged 64-66 years crossing the cutoff experience an abrupt jump in score.
Not validated in patients with prior revascularization or active ACS within the preceding 6 months.

Frequently asked questions

HEART vs TIMI: which is more accurate?

In the emergency department, HEART is more accurate overall in combining sensitivity and specificity. TIMI was developed for patients with already confirmed ACS, not for triage.

Can a patient with a HEART score of 3 be discharged?

Yes, if troponin is negative at two time points (0 and 3 hours) and there are no acute ECG changes. A scheduled cardiology follow-up within 72 hours is required.

What counts as a 'moderately typical' history?

Pain with a typical location that does not meet all criteria for angina: the exertional pattern is not clear, or radiation is atypical, or autonomic symptoms are mixed.

Is the score applicable to young patients under 45?

Yes. The age component scores 0, which combined with a negative ECG and troponin reliably places the patient in the low-risk category.

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Aleksandr A. Aulov Physician, internal medicine, Sechenov School — independent medical education platform. Calculators are compiled from the original publications and current clinical guidelines. Interpretation thresholds follow the source study unless stated otherwise.

This calculator is intended for healthcare professionals. Do not use it for self-diagnosis or self-treatment. Management decisions are made by the treating clinician based on the full clinical picture of the individual patient.