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HE-MACS ACS Probability Calculator (Alghamdi 2019)
x402
HE-MACS ACS Probability Calculator (Alghamdi 2019) is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Calculates the probability of acute coronary syndrome (ACS) using the HE-MACS model based on age, sex, and six clinical observations.
Price / call$0.005
Success—
StatusUnknown
How this service works
Alghamdi 2019 HE-MACS ACS probability from age, sex, caller-assigned observed sweating, acute ECG ischaemia, right-arm or shoulder radiation, vomiting, hypotension (SBP <100), and current smoking. Table 2 printed coefficients. Returns probability only; four-group ROC thresholds are in that paper's supplement and are not restated here. magent does not interpret ECG or take a history. Not MACS (Body 2014 biomarkers) or T-MACS. Not a diagnosis.
Output
Returns a single numeric probability (0–1) representing the likelihood of acute coronary syndrome (ACS) as computed by the Alghamdi 2019 HE-MACS logistic regression model using the Table 2 coefficients. Does not include ROC-based risk group thresholds, ECG interpretation, or a clinical diagnosis.
Example use cases
Emergency triage for chest pain patient
“I need the HE-MACS ACS probability for a 72-year-old female presenting with chest pain — sweating is observed, no acute ECG ischaemia, pain does radiate to the right shoulder, she is vomiting, her systolic BP is 88 so she's hypotensive, and she is not a current smoker.”
Low-risk chest pain stratification
“Can you calculate the Alghamdi 2019 HE-MACS score for a 45-year-old male with no observed sweating, no ECG changes, no right arm radiation, no vomiting, normal blood pressure, and he doesn't smoke? I want to see how low the ACS probability is.”
Automated cardiac risk scoring in clinical workflow
“Score this patient with HE-MACS: 63-year-old female, sweating observed, no acute ECG ischaemia, no right arm or shoulder radiation, no vomiting, not hypotensive, current smoker — give me the probability of ACS.”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/he_macsWhen to prefer
Choose this endpoint when you need to apply the specific Alghamdi 2019 HE-MACS model for ACS probability estimation using only clinical signs (no biomarkers required). Prefer this over MACS (Body 2014) or T-MACS when biomarker data is unavailable or when replicating the HE-MACS study methodology. It is not a substitute for HEART score, TIMI, or GRACE, and does not replace clinical judgment or ECG interpretation.
Side effects
- Missing required query parameter returns an error (e.g. omitting age or sex)
- Age value outside the clamped range (18–100) may be silently clamped or return a validation error
- Invalid sex value (not 'male' or 'female') returns a validation error
- Boolean fields passed as strings instead of true/false booleans may fail schema validation
- Network or payment (x402) failure results in no response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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