OESIL syncope risk score

OESIL

Compute the Osservatorio Epidemiologico sulla Sincope nel Lazio (OESIL) risk score as the Colivicchi 2003 arithmetic sum of four predictors: age >65 years, history of cardiovascular disease, syncope without prodromes, and abnormal ECG.

LIVE $0.005 USDC GET /api/calc/oesil

Markdown: /docs/oesil.md · Canonical: https://magentlab.com/docs/oesil

Not a medical device. Not a diagnosis, dose, or listing recommendation.

What it computes

When to use

When an agent needs the published OESIL point total from caller-assigned flags and must not invent a syncope history, read an ECG, or treat derivation-cohort mortality as an individual prediction.

When not to use

Not a medical device. Not a disposition protocol, admission order, or syncope diagnosis.
Age 18-120 is an implementation clamp; Colivicchi 2003 scored age >65 (age 65 is 0 points). magent does not apply a high-risk cutoff from later papers.
The 12-month mortality percents reported in the derivation cohort (0%, 0.8%, 19.6%, 34.7%, 57.1% for scores 0-4) are cohort observations, not this patient's predicted risk, and are not returned on the JSON.
The caller assigns cardiovascular_disease, syncope_without_prodromes, and abnormal_ecg. magent does not take a history or read an ECG.

Formula

OESIL = age_gt_65 + cardiovascular_disease + syncope_without_prodromes + abnormal_ecg; 1 point each; range 0-4 (Colivicchi 2003)

Citation

Title: Development and prospective validation of a risk stratification system for patients with syncope in the emergency department: the OESIL risk score
Authors: Colivicchi F, Ammirati F, Melina D, Guido V, Imperoli G, Santini M
Source: Eur Heart J. 2003;24(9):811-819
DOI: 10.1016/S0195-668X(02)00827-8

Worked example

Age 50, all predictors false

Given: abnormal_ecg=falseage=50cardiovascular_disease=falsesyncope_without_prodromes=false

Age 50 is not >65 → 0; cardiovascular_disease false → 0; syncope_without_prodromes false → 0; abnormal_ecg false → 0
Score = 0 (max 4)

Also searched as

OESIL score
OESIL risk score
Colivicchi syncope score
Osservatorio Epidemiologico sulla Sincope nel Lazio
syncope OESIL 2003
ED syncope OESIL

Try

Opens the live endpoint. Unpaid browser requests show the paywall; agents should send Accept: application/json.

/api/calc/oesil?age=50&cardiovascular_disease=false&syncope_without_prodromes=false&abnormal_ecg=false

Full URL: https://api.magentlab.com/api/calc/oesil?age=50&cardiovascular_disease=false&syncope_without_prodromes=false&abnormal_ecg=false

Call

Expect HTTP 402 until you retry with PAYMENT-SIGNATURE. Incomplete query params return HTTP 400 before any quote or charge.

curl -i -H "Accept: application/json" "https://api.magentlab.com/api/calc/oesil?age=50&cardiovascular_disease=false&syncope_without_prodromes=false&abnormal_ecg=false"

Parameters

Name	Type	Required	Description
`age`	integer	required	Age in years (18-120). Age >65 scores 1; age 65 scores 0. 18 is an implementation clamp.
`cardiovascular_disease`	boolean	required	History of cardiovascular disease (Colivicchi 2003, 1 point). true or false as assigned by the caller.
`syncope_without_prodromes`	boolean	required	Syncope without prodromes (Colivicchi 2003, 1 point). true or false as assigned by the caller.
`abnormal_ecg`	boolean	required	Abnormal ECG (Colivicchi 2003, 1 point). true or false as assigned by the caller. magent does not read an ECG.

Bulk (POST)

POST the same path with a JSON items array. The first item is the GET unit; each additional item is $0.002. Invalid items return HTTP 400 before settlement.

POST /api/calc/oesil Max 25 unit_amount + extra_item_amount * (n - 1) extra $0.002 PREVIEW

1 to 25 items. Each item uses the same keys as the GET query parameters.
POST of 1 item costs the same as GET. Lists longer than 25: chunk into multiple POSTs. Extra items still execute; do not pad dummy rows.
The first invalid item fails the whole request (index in the 400 JSON). You are not charged.
HTTP 200 is {count, path, items}. Each items[i] is the GET 200 body for that row.
Catalog misses (empty matches, found=false) stay paid 200s inside that slot.
x402 resource URL is this path plus n and body_sha256. Browsers that prefer text/html get the same paywall as GET; Pay retries POST with the same items.

Example request (fixture)

{
  "items": [
    {
      "abnormal_ecg": "false",
      "age": "50",
      "cardiovascular_disease": "false",
      "syncope_without_prodromes": "false"
    },
    {
      "abnormal_ecg": "false",
      "age": "50",
      "cardiovascular_disease": "false",
      "syncope_without_prodromes": "false"
    }
  ]
}

Open bulk paywall →

Opens a two-item fixture on the API host. Unpaid browsers get the same MetaMask paywall as GET; Pay retries POST with those items.

Example 200 (fixture)

{
  "count": 2,
  "path": "/api/calc/oesil",
  "items": [
    {
      "components": [
        {
          "value": 50,
          "factor": "age_gt_65",
          "points": 0,
          "present": false
        },
        {
          "factor": "cardiovascular_disease",
          "points": 0,
          "present": false
        },
        {
          "factor": "syncope_without_prodromes",
          "points": 0,
          "present": false
        },
        {
          "factor": "abnormal_ecg",
          "points": 0,
          "present": false
        }
      ],
      "disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
      "citation": {
        "authors": "Colivicchi F, Ammirati F, Melina D, Guido V, Imperoli G, Santini M",
        "doi": "10.1016/S0195-668X(02)00827-8",
        "id": "colivicchi-2003",
        "pmid": "12727148",
        "source": "Eur Heart J. 2003;24(9):811-819",
        "title": "Development and prospective validation of a risk stratification system for patients with syncope in the emergency department: the OESIL risk score"
      },
      "formula": "oesil",
      "formula_expression": "OESIL = age_gt_65 + cardiovascular_disease + syncope_without_prodromes + abnormal_ecg; 1 point each; range 0-4 (Colivicchi 2003)",
      "max_score": 4,
      "score": 0,
      "age_years": 50
    },
    {
      "components": [
        {
          "value": 50,
          "factor": "age_gt_65",
          "points": 0,
          "present": false
        },
        {
          "factor": "cardiovascular_disease",
          "points": 0,
          "present": false
        },
        {
          "factor": "syncope_without_prodromes",
          "points": 0,
          "present": false
        },
        {
          "factor": "abnormal_ecg",
          "points": 0,
          "present": false
        }
      ],
      "disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
      "citation": {
        "authors": "Colivicchi F, Ammirati F, Melina D, Guido V, Imperoli G, Santini M",
        "doi": "10.1016/S0195-668X(02)00827-8",
        "id": "colivicchi-2003",
        "pmid": "12727148",
        "source": "Eur Heart J. 2003;24(9):811-819",
        "title": "Development and prospective validation of a risk stratification system for patients with syncope in the emergency department: the OESIL risk score"
      },
      "formula": "oesil",
      "formula_expression": "OESIL = age_gt_65 + cardiovascular_disease + syncope_without_prodromes + abnormal_ecg; 1 point each; range 0-4 (Colivicchi 2003)",
      "max_score": 4,
      "score": 0,
      "age_years": 50
    }
  ]
}

Response

Field	Type	Description
`formula`	string	oesil
`formula_expression`	string	Exact expression used
`score`	integer	OESIL points 0-4
`max_score`	integer	Always 4
`age_years`	integer	Age used for the >65 criterion
`components`	array	Per-factor points
`citation`	object	Colivicchi et al. Eur Heart J 2003 citation
`disclaimer`	string	Not-a-device notice

Example JSON

Machine form of the same example. Frozen fixture. Not a live lookup.

{
  "components": [
    {
      "value": 50,
      "factor": "age_gt_65",
      "points": 0,
      "present": false
    },
    {
      "factor": "cardiovascular_disease",
      "points": 0,
      "present": false
    },
    {
      "factor": "syncope_without_prodromes",
      "points": 0,
      "present": false
    },
    {
      "factor": "abnormal_ecg",
      "points": 0,
      "present": false
    }
  ],
  "disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
  "citation": {
    "authors": "Colivicchi F, Ammirati F, Melina D, Guido V, Imperoli G, Santini M",
    "doi": "10.1016/S0195-668X(02)00827-8",
    "id": "colivicchi-2003",
    "pmid": "12727148",
    "source": "Eur Heart J. 2003;24(9):811-819",
    "title": "Development and prospective validation of a risk stratification system for patients with syncope in the emergency department: the OESIL risk score"
  },
  "formula": "oesil",
  "formula_expression": "OESIL = age_gt_65 + cardiovascular_disease + syncope_without_prodromes + abnormal_ecg; 1 point each; range 0-4 (Colivicchi 2003)",
  "max_score": 4,
  "score": 0,
  "age_years": 50
}

Client errors (HTTP 400)

Invalid params return 400 without charge. Shared HTTP 402 and 503 meanings: Payments.

HTTP	Code	When
400	`invalid_age`	age must be an integer from 18 to 120 Returned before settlement; you are not charged.
400	`invalid_flag`	boolean clinical flags must be true or false Returned before settlement; you are not charged.
400	`invalid_items`	POST body must be a JSON object with only an items array Returned before settlement; you are not charged.
400	`invalid_item_count`	items must be an array of 1 to 25 objects Returned before settlement; you are not charged.
400	`invalid_item`	each items entry must be a JSON object Returned before settlement; you are not charged.

Related tools

San Francisco Syncope Rule — Compute the San Francisco Syncope Rule (CHESS) criterion count and rule-positive flag from published cutoffs.
EGSYS — Sum the six Del Rosso 2008 EGSYS flags and return whether the total is ≥3 (published cardiac-syncope triage discriminator).

Payment

Unpaid requests return HTTP 402 even if query parameters or POST items are missing or invalid, so CDP and agents can index the path. After a PAYMENT-SIGNATURE, invalid params return HTTP 400 JSON before settlement. magent does not charge. Fix the params, then request a new 402 quote for that complete URL. Catalog misses (empty matches, found=false) are valid paid 200s. Unpaid valid requests return HTTP 402 with a base64 PAYMENT-REQUIRED header. HTTP 503 is not a new quote: retry the same PAYMENT-SIGNATURE. Full handshake and shared payment errors: Payments. Stdio MCP: /docs/mcp.

Guarantees

HTTP 402 is unpaid, including a missing query. After PAYMENT-SIGNATURE, invalid parameters return HTTP 400 before settlement. You are not charged. HTTP 402 never includes the tool JSON.
exact: settlement finishes before the tool (paymentFlow upfront). batch-settlement: verify/deposit before the tool; chargedCumulativeAmount commits after HTTP 2xx. Uncertain or failed settlement fails closed (HTTP 503). Retry the same PAYMENT-SIGNATURE.
HTTP 402 is unpaid only. Do not sign a second authorization because of a 503.
Execution is timeout-bounded and concurrency-capped.
Calculator inputs are stored encrypted for allowlisted operators (Magent Console). They are not in public logs, SSH lookups, catalog, or rollups. Request logs store path without query.