HEART Score Calculator
An interactive implementation of the HEART score for chest pain (Backus et al.): history, ECG, age, risk factors and troponin scored 0 to 10 to estimate 6-week major adverse cardiac event risk.
Score the five HEART elements, history, ECG, age, risk factors and troponin, from 0 to 2 each to get a total from 0 to 10, with the corresponding published 6-week major adverse cardiac event rate. Use it to support emergency department disposition decisions alongside the local troponin rule-out pathway.
What is the HEART score?
The HEART score was designed for the most common dilemma in emergency medicine: what to do with chest pain that might be cardiac. Published by Backus and colleagues in 2008 and validated in multiple cohorts since, it takes five pieces of information available within the first hour of assessment and sorts patients into low, moderate and high risk groups with sharply different 6-week outcomes. Its appeal is memorability: five elements, three levels each, and a total that fits on one hand.
The score's practical role is disposition support. A low score of 0 to 3, after myocardial infarction has been ruled out with serial troponins, identifies patients who can often be discharged with outpatient follow-up rather than admitted. A moderate score of 4 to 6 warrants observation, serial testing and usually cardiology input. A high score of 7 to 10 describes patients who should be managed as high-risk acute coronary syndrome with prompt cardiology involvement. The score never replaces the diagnostic pathway; it organises what the pathway finds.
The five elements explained
History is scored 0 for slightly suspicious, 1 for moderately suspicious and 2 for highly suspicious, and it is deliberately the most clinical of the five elements. Typical high-suspicion features are retrosternal pressure or heaviness, radiation to arm, neck or jaw, associated diaphoresis, nausea or dyspnoea, and onset with exertion or emotional stress. Atypical features such as sharp, positional or fully reproducible chest wall tenderness lower suspicion, though they never exclude ACS on their own.
The ECG scores 0 when normal, 1 for non-specific repolarization abnormalities such as minor ST or T wave changes, and 2 for significant ST deviation. Age scores 0 at 44 or below, 1 from 45 to 64, and 2 at 65 or above. Risk factors score 0 for none, 1 for one to two, and 2 for three or more or any history of atherosclerotic disease. Troponin scores 0 when at or below the upper limit of normal, 1 at one to three times the limit, and 2 above three times the limit, using the first available value.
How to interpret the score
The validated 6-week MACE rates are approximately 1.7 percent for scores 0 to 3, 12 to 20 percent for scores 4 to 6, and 50 to 65 percent for scores 7 to 10. The low-risk group is the actionable one: multiple implementation studies have shown that discharging low-risk HEART patients after a negative serial troponin workup is safe and reduces admissions and length of stay. The moderate group is the observation group, where the score justifies the resources of serial testing and monitoring. The high group should trigger the ACS pathway without delay.
Two cautions keep the score honest. First, the troponin element uses the first value, but a rising pattern on serial testing overrides an initially reassuring total, which is why the score sits inside a pathway rather than replacing it. Second, the history element is subjective, and inter-rater agreement is imperfect; when the story is concerning despite reassuring objective elements, the clinician's judgment should win. The HEART score supports disposition, it does not certify safety.
HEART in the high-sensitivity troponin era
Contemporary emergency departments use high-sensitivity troponin with 0-hour and 1-hour algorithms that rule out myocardial infarction faster than the assays available when HEART was derived. The score remains useful because troponin alone does not capture the patients who need admission for unstable angina or for expedited outpatient workup: a patient with a highly suspicious history, ischaemic ECG changes and multiple risk factors but a negative initial troponin still needs more than reassurance. Several pathways now combine HEART with high-sensitivity troponin kinetics, using the score to decide who needs observation and the troponin delta to decide who has infarcted.
Limitations
The history element's subjectivity is the score's best-known weakness, and structured history-taking improves consistency. The score was derived before high-sensitivity troponin, so its troponin thresholds map imperfectly onto modern assays. It does not incorporate sex-specific troponin cutoffs, renal function, or prior coronary anatomy, all of which modify risk. Its validation is strongest in the emergency department chest pain population; applying it to inpatients or to asymptomatic patients stretches it beyond its evidence. Finally, like all risk scores, it describes groups: an individual patient's course can always diverge from the group's average.
References
- Backus BE, Six AJ, Kelder JC, et al. Chest pain in the emergency room: a multicenter validation of the HEART Score. Crit Pathw Cardiol. 2010;9(3):164-169.
- 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):2153-2158.
- Laureano-Phillips J, Robinson RD, Aryal S, et al. HEART score risk stratification of low-risk chest pain patients in the emergency department: a systematic review and meta-analysis. Ann Emerg Med. 2019;74(2):187-203.
Key takeaways
- The HEART score sums history, ECG, age, risk factors and troponin, each scored 0 to 2, into a total from 0 to 10 for emergency department chest pain.
- Published 6-week major adverse cardiac event rates are about 1.7 percent for scores 0 to 3, 12 to 20 percent for 4 to 6, and 50 to 65 percent for 7 to 10.
- Low-risk patients, after myocardial infarction is ruled out with serial troponins, can often be discharged with outpatient follow-up.
- Moderate-risk patients warrant observation and serial testing; high-risk patients should enter the ACS pathway promptly.
- The history element is subjective, so concerning stories should override reassuring objective elements.
- Use the score alongside the local high-sensitivity troponin rule-out pathway, not instead of it.
Frequently asked questions
What is the HEART score used for?
The HEART score stratifies the 6-week risk of major adverse cardiac events, myocardial infarction, percutaneous coronary intervention, coronary artery bypass grafting, or death, in emergency department patients presenting with chest pain. It scores five elements from 0 to 2 each: history, ECG, age, risk factors, and troponin, for a total of 0 to 10. Scores of 0 to 3 indicate low risk with about 1.7 percent event rate, 4 to 6 moderate risk with about 12 to 20 percent, and 7 to 10 high risk with about 50 to 65 percent.
Can a low HEART score rule out acute coronary syndrome?
A HEART score of 0 to 3 identifies a low-risk group in whom early discharge is often considered, but only after acute myocardial infarction has been ruled out with serial troponins according to the local chest pain pathway. The score is a risk stratification tool, not a substitute for the diagnostic workup, and clinical judgment remains essential, especially when the history is concerning despite reassuring objective elements.
How is the history element of HEART scored?
History is the most subjective element: 0 points for a slightly suspicious history, 1 point for a moderately suspicious history, and 2 points for a highly suspicious history. Features raising suspicion include retrosternal pressure-like pain, radiation, associated sweating or nausea, and exertional onset. Because it is judgment-based, different clinicians may score the same history differently, which is a known limitation of the score.
What troponin timing does the HEART score assume?
The original score used the first available troponin, scored as 0 for normal, 1 for one to three times the upper limit of normal, and 2 for more than three times the upper limit. Contemporary practice uses high-sensitivity troponin with 0-hour and 1-hour or 3-hour algorithms; the HEART score should be applied alongside, not instead of, these rule-out pathways, and a rising troponin on serial testing overrides a reassuring initial score.
What is the difference between HEART and TIMI or GRACE?
HEART is designed for undifferentiated chest pain in the emergency department before ACS is diagnosed, whereas TIMI and GRACE apply after unstable angina or NSTEMI has been diagnosed. HEART predicts 6-week major adverse cardiac events including revascularization, while GRACE focuses on mortality. In the emergency department, HEART guides disposition; after admission with confirmed ACS, GRACE and TIMI guide inpatient management.
Should the HEART score be recalculated with the second troponin?
The score was validated using the first troponin, and formal recalculation is not part of the original method. In practice, a rising troponin on serial testing establishes myocardial injury regardless of the initial total and should drive management. Some pathways incorporate the troponin delta qualitatively rather than recomputing the score.