INTERCHEST Rule (Chest Pain, CAD)
INTERCHEST rule (Aerts 2017): probability that chest pain is coronary in primary care.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Age
- 60 years
- Sex
- Male
- History of coronary artery disease
- Yes
- Pain feels like pressure
- Yes
- Pain reproducible by palpation
- Yes
Result: INTERCHEST 2 — CAD not excluded (probability about 43%); expedite cardiac testing.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- < 2
- CAD unlikely (probability ~2.1%, NPV ~98%).
- >= 2
- CAD not excluded (~43%); expedite cardiac testing. Primary-care rule, not for ED acute-coronary-syndrome triage.
What you enter
- Age (years)
- Sex
- History of coronary artery disease
- Pain brought on by exertion
- Pain feels like pressure
- Physician initially suspected a serious / cardiac cause
- Pain reproducible by palpation (subtracts 1)
How this is calculated
- Points
- age/sex (F>=65 or M>=55) +1, history of CAD +1, exertional pain +1, pressure-like pain +1, physician suspected cardiac +1, reproducible by palpation -1 = -1 to +5.
Aerts M, Minalu G, Bosner S, et al. Pooled individual patient data from five countries were used to derive a clinical prediction rule for coronary artery disease in primary care. J Clin Epidemiol. 2017;81:120-128. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.