Enter Assessment Inputs
Large screens use three columns, smaller screens use two, and phones use one.
Example Data Table
Sample scenarios showing how the component points roll into a total score.
| Case | Age | History | ECG | Risk Factors | Troponin | Total | Band |
|---|---|---|---|---|---|---|---|
| Example A | 38 | Slightly suspicious (0) | Normal (0) | 1 factor (1) | Normal limit (0) | 1 | Low |
| Example B | 58 | Moderately suspicious (1) | Nonspecific changes (1) | 3 factors (2) | 1.8× URL (1) | 6 | Intermediate |
| Example C | 72 | Highly suspicious (2) | ST depression (2) | Known disease (2) | 4.2× URL (2) | 10 | High |
Formula Used
The calculator totals five HEART components. Each component contributes 0, 1, or 2 points.
Total HEART Score = History + ECG + Age + Risk Factors + Troponin
- History: Slightly suspicious = 0, moderate = 1, highly suspicious = 2.
- ECG: Normal = 0, nonspecific repolarization disturbance = 1, significant ST depression = 2.
- Age: Under 45 = 0, 45 to 64 = 1, 65 or older = 2.
- Risk Factors: None = 0, one to two = 1, three or more = 2. Known atherosclerotic disease also scores 2.
- Troponin: At or below the upper reference limit = 0, over 1× to 3× = 1, over 3× = 2.
How to Use This Calculator
- Enter the patient label, encounter ID, and assessment date if you want them in exports.
- Input age and select the clinician-assessed history and ECG categories.
- Tick all present risk factors and mark known atherosclerotic disease when applicable.
- Enter the measured troponin and the assay’s upper reference limit using the same units.
- Submit the form to view the result summary, component table, graph, and export options.
Frequently Asked Questions
1. What does HEART stand for?
HEART stands for History, ECG, Age, Risk factors, and Troponin. Each domain adds 0 to 2 points, creating a total score from 0 to 10.
2. Does a low score rule out every serious cause?
No. A low score lowers estimated cardiac risk, but it does not exclude every dangerous diagnosis. Clinical examination, repeat testing, ECG review, and local pathways still matter.
3. Why do I enter both troponin value and upper reference limit?
The score uses how elevated troponin is relative to the assay’s upper reference limit. Entering both values lets the calculator derive the correct troponin point band.
4. How are risk factors counted here?
The calculator counts the selected risk factors. None scores 0, one or two score 1, and three or more score 2. Known atherosclerotic disease also triggers 2 points.
5. Why is history chosen manually instead of automatically?
The history component depends on clinician judgment about how suspicious the presentation is for ischemia. That nuance is difficult to infer safely from a few raw form fields.
6. Can I use high-sensitivity troponin values?
Yes, as long as the entered upper reference limit matches the assay used. The calculator scores based on the ratio between the patient value and that assay limit.
7. What do the risk bands mean?
The calculator groups totals into low, intermediate, and high conventional HEART bands. These bands support risk stratification, but they should not replace structured chest pain pathways.
8. What do the CSV and PDF exports include?
They include patient identifiers entered in the form, component points, total score, risk band, troponin ratio, summary text, and notes. This helps with documentation and review.