HEART Score Calculator

HEART Score Calculator for Cardiology. Scores of 0 to 3 define the low-risk group, with a 6-week MACE rate of roughly 1 to 2 percent in the prospective multicenter validation, supporting consideration of early discharge without admission. Scores of 4 to 6 are intermediate (approximately 12 to 17 percent MACE), favoring admission, serial troponin, and further objective evaluation. Scores of 7 to 10 are high risk (roughly 50 to 65 percent MACE), prompting early aggressive management and consideration of an invasive strategy. Many contemporary accelerated pathways combine a low HEART score with two negative serial troponins (the HEART Pathway) to strengthen the safety of discharge.

How this calculator works

The HEART score sums five equally weighted domains, each scored 0, 1, or 2, for a total of 0 to 10: History (degree of suspicion for the chest-pain story), ECG (normal vs nonspecific repolarization vs significant ST deviation), Age (under 45, 45 to 64, 65 or older), Risk factors (hypertension, hypercholesterolemia, diabetes, smoking, family history, obesity, and known atherosclerotic disease), and Troponin (below, one-to-three-fold above, or more than three-fold above the assay's upper reference limit). It does not weight troponin more heavily than the other four domains, which is a deliberate design choice separating it from purely biomarker-driven tools.

When to use this calculator

Use it in adult patients presenting to the emergency department with undifferentiated chest pain in whom acute coronary syndrome is being considered, to stratify 6-week risk of major adverse cardiac events (MACE: all-cause death, myocardial infarction, or coronary revascularization). It is intended to identify a low-risk group who can be safely discharged early. It should NOT be applied to patients with STEMI (who bypass risk scoring), ongoing unstable angina with hemodynamic instability, or non-cardiac diagnoses; it is not validated for asymptomatic screening or for pediatric patients.

Inputs used

  • Clinical history
  • ECG findings
  • Age
  • Coronary risk factors
  • Troponin level

Clinical interpretation

Scores of 0 to 3 define the low-risk group, with a 6-week MACE rate of roughly 1 to 2 percent in the prospective multicenter validation, supporting consideration of early discharge without admission. Scores of 4 to 6 are intermediate (approximately 12 to 17 percent MACE), favoring admission, serial troponin, and further objective evaluation. Scores of 7 to 10 are high risk (roughly 50 to 65 percent MACE), prompting early aggressive management and consideration of an invasive strategy. Many contemporary accelerated pathways combine a low HEART score with two negative serial troponins (the HEART Pathway) to strengthen the safety of discharge.

Worked example

A 58-year-old with moderately suspicious history (1), a nonspecific ECG with mild repolarization changes (1), age 45 to 64 (1), three risk factors including diabetes and smoking (2), and an initial troponin just below the upper reference limit (0) scores 1+1+1+2+0 = 5. A score of 5 falls in the moderate-risk 4 to 6 band, corresponding to roughly a 12 to 17 percent 6-week MACE rate, so this patient warrants admission or an accelerated observation pathway with serial troponin and objective testing rather than discharge.

Limitations and safety notes

Performance depends on a single initial troponin unless embedded in a serial-troponin pathway; a low score with only one troponin draw missed a small but real fraction of events in validation cohorts (miss rates around 1.6 to 1.7 percent), so most protocols pair it with serial testing. The History component is subjective and inter-rater agreement is only moderate, which can shift borderline patients across bands. It was derived and validated predominantly in Dutch and Western populations and may be less discriminating in younger patients with atypical presentations, cocaine-associated chest pain, or in those with baseline ECG abnormalities such as LBGB or paced rhythm that limit ECG scoring.

Frequently asked questions

How is the HEART score different from TIMI and GRACE?

HEART was purpose-built for undifferentiated ED chest pain rather than for confirmed ACS. In the Backus validation it outperformed both, with a c-statistic of 0.83 versus 0.75 for TIMI and 0.70 for GRACE, and it identifies a larger low-risk population suitable for discharge.

Can I discharge a patient on a single troponin if the HEART score is low?

A score of 0 to 3 carries about a 1 to 2 percent 6-week MACE risk, but the safest approach is the HEART Pathway, which requires a low HEART score plus two negative serial troponins (typically 0 and 3 hours) before discharge. A single-troponin strategy leaves a small residual miss rate.

What counts as a risk factor in the risk-factor domain?

Hypertension, hypercholesterolemia, diabetes mellitus, current or recent smoking, a positive family history of premature coronary disease, and obesity (BMI over 30). One or two factors score 1; three or more, or any history of established atherosclerotic disease such as prior MI, PCI, CABG, stroke, or peripheral arterial disease, score 2.

Does a high-sensitivity troponin change how I score the troponin domain?

The troponin points are anchored to multiples of the assay's own upper reference limit (normal, one-to-three-fold elevated, or greater than three-fold), so the domain adapts to whichever assay your lab uses, including high-sensitivity assays. Accelerated hs-troponin pathways can further shorten the rule-out window.

References

  • Six AJ, Backus BE, Kelder JC. Chest pain in the emergency room: value of the HEART score. Neth Heart J. 2008;16(6):191-6. PMID: 18665203.
  • Backus BE, Six AJ, Kelder JC, et al. A prospective validation of the HEART score for chest pain patients at the emergency department. Int J Cardiol. 2013;168(3):2153-8. PMID: 23465250.
  • Gulati M, Levy PD, Mukherjee D, et al. 2021 AHA/ACC/ASE/CHEST/SAEM/SCCT/SCMR Guideline for the Evaluation and Diagnosis of Chest Pain. American College of Cardiology/American Heart Association. 2021.

Editorial review and citation methodology

Reviewed by the Quick Medical Calculator Editorial Team. Last reviewed: March 25, 2026. The review checks calculator inputs, intended population, interpretation, limitations, and source alignment.

  • Prefer original validation studies for scoring systems and prediction tools.
  • Use current specialty society guidance, transplant allocation policy, public health guidance, or regulator resources when they govern clinical use.
  • Include limitations and safety notes when a calculator is population-specific, context-dependent, or unsuitable as a standalone decision tool.

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