🫀 HEART Score Calculator

The HEART score turns five ED findings into 6-week cardiac risk: a 58-year-old with a moderately suspicious story (1), non-specific ECG changes (1), age 45-64 (1), two risk factors (1), and normal troponin (0) scores 4, moderate risk with ~12-20% MACE. Answer the five items for the score.

How to Use This Calculator

Backus et al. validated the HEART score in 2008-2013 for emergency department chest pain triage. It sorts patients into discharge, observe, or admit pathways. For clinicians and the clinically curious.

The Five Components

The mnemonic's power is completeness: it forces the clinician to weigh the story (history), the tracing (ECG), the patient (age, risk factors), and the biomarker (troponin) together, preventing the common error of anchoring on one reassuring element. History scoring is deliberately gestalt: highly suspicious means typical exertional pressure with radiation and diaphoresis; slightly suspicious means atypical, positional, or reproducible chest-wall pain. The troponin component uses the initial value; the HEART pathway adds a second troponin at 3 hours, and the score plus serial troponins is what safely discharges low-risk patients.

Worked Example

58-year-old: history moderately suspicious (1: exertional tightness, no radiation), ECG non-specific ST flattening (1), age 45-64 (1), hypertension plus smoking (1), troponin normal (0): total 4, moderate, ~12-20% MACE: admit to observation, serial troponins, cardiology. Contrast: 38-year-old, atypical sharp pain reproducible on palpation (0), normal ECG (0), under 45 (0), no risk factors (0), normal troponin (0): total 0, ~1.7%: discharge with primary-care follow-up. I verified the calculator sums and bands correctly. The low-risk miss rate (~1.7%) is the accepted trade: no pathway reaches zero, and shared decision-making covers the residual.

Pathways by Score

The score's real-world win was cutting unnecessary admissions: before HEART pathways, most chest pain stayed overnight; after, low-risk patients go home safely, saving beds without missing MIs. High-sensitivity troponin protocols (0/1-hour algorithms) now complement it, and many EDs combine both. For related tools, our GRACE score takes over once ACS is confirmed, our Framingham score covers the primary-prevention side, and our ECG heart rate calculator reads the tracing's vital sign.

HEART vs GRACE vs TIMI

HEART triages undifferentiated chest pain including non-cardiac cases (its job is disposition); GRACE predicts mortality in confirmed ACS (its job is invasiveness timing); TIMI does both crudely. Use HEART at the door, GRACE once the diagnosis is ACS. They are sequential, not competing.

Limits

History scoring is subjective: two clinicians can score the same story differently, which is the score's known weak point. It was validated with conventional troponins; high-sensitivity assays shift the troponin component's meaning. It does not apply to STEMI (which bypasses scoring to the cath lab), unstable vitals, or clearly non-cardiac pain. And 1.7% is not zero: low-risk discharge needs clear return precautions and follow-up, rather than a number alone.

Document the HEART score components in the chart alongside the total: 'HEART 4 (H1 E1 A1 R1 T0)' lets the next clinician see exactly which elements drove the decision and which to recheck. Re-score when new information arrives: a second troponin or a changed ECG updates the total and sometimes the disposition. When in doubt, the serial troponin decides: biomarkers outrank gestalt when they disagree. That hierarchy is the whole point of the pathway.

The HEART Pathway in Practice

The score is only half the pathway; serial troponins are the other half. The validated HEART pathway combines the score with 0- and 3-hour troponins: low-risk (0-3) with negative serial troponins goes home, often with expedited outpatient follow-up within 72 hours. Moderate-risk patients get observation, repeat ECGs, and cardiology input, with stress testing or coronary CT angiography before discharge. High-risk patients are managed as ACS from the door. Implementation studies showed this pathway cut admissions and length of stay without increasing missed MACE, which is why it spread: it gave emergency physicians medicolegal cover to discharge, addressing the real reason low-risk patients were admitted (fear, not medicine). For patients, the practical meaning: a HEART score of 2 with two negative troponins is one of the safest discharges in emergency medicine, while a 5 with a rising troponin is an admission whatever the story sounded like initially.

For informational purposes only, not medical advice. Consult a healthcare professional.