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Sgarbossa criteria

Sgarbossa

Sum the three Sgarbossa 1996 GUSTO-1 ECG criteria in left bundle-branch block and return whether the total is ≥3.

LIVE $0.005 USDC GET /api/calc/sgarbossa

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

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

What it computes

Sum the three Sgarbossa 1996 GUSTO-1 ECG criteria in left bundle-branch block and return whether the total is ≥3.

When to use

When an agent needs the published Sgarbossa 1996 point total from caller-assigned ECG flags and must not invent ST measurements or apply the Smith modification.

When not to use

  • Not a diagnosis of myocardial infarction, reperfusion decision, or STEMI equivalent.
  • This is Sgarbossa 1996 GUSTO-1 scoring only. Not the Smith-modified Sgarbossa criteria.
  • magent does not read the tracing. Each flag is caller-assigned.

Formula

Sgarbossa = 5*concordant_st_elevation_1mm + 3*concordant_st_depression_v1_v3 + 2*discordant_st_elevation_5mm; max 10; score_ge_3 iff total >= 3

Citation

Title
Electrocardiographic diagnosis of evolving acute myocardial infarction in the presence of left bundle-branch block
Authors
Sgarbossa EB, Pinski SL, Barbagelata A, et al.
Source
N Engl J Med. 1996;334(8):481-487
DOI
10.1056/NEJM199602223340801

Worked example

No criteria

Given: concordant_st_depression_v1_v3=falseconcordant_st_elevation_1mm=falsediscordant_st_elevation_5mm=false

  1. score = 0
  2. max_score 10
  3. score_ge_3 false (threshold is ≥3)

Concordant ST elevation ≥1 mm

Given: concordant_st_depression_v1_v3=falseconcordant_st_elevation_1mm=truediscordant_st_elevation_5mm=false

  1. concordant ST elevation → 5
  2. score = 5
  3. score_ge_3 true

Also searched as

  • Sgarbossa criteria
  • Sgarbossa score
  • LBBB AMI criteria
  • GUSTO-1 Sgarbossa
  • AMI with left bundle branch block
  • concordant ST elevation LBBB
  • Sgarbossa 1996

Try

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

/api/calc/sgarbossa?concordant_st_elevation_1mm=false&concordant_st_depression_v1_v3=false&discordant_st_elevation_5mm=false

Full URL: https://api.magentlab.com/api/calc/sgarbossa?concordant_st_elevation_1mm=false&concordant_st_depression_v1_v3=false&discordant_st_elevation_5mm=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/sgarbossa?concordant_st_elevation_1mm=false&concordant_st_depression_v1_v3=false&discordant_st_elevation_5mm=false"

Parameters

Name Type Required Description
concordant_st_elevation_1mm boolean required Concordant ST elevation ≥1 mm in a lead with a positive QRS (Sgarbossa 1996, 5 points). true or false as assigned by the caller. magent does not measure the ECG.
concordant_st_depression_v1_v3 boolean required Concordant ST depression ≥1 mm in V1, V2, or V3 (Sgarbossa 1996, 3 points). true or false as assigned by the caller. magent does not measure the ECG.
discordant_st_elevation_5mm boolean required Discordant ST elevation ≥5 mm (ST opposite QRS; Sgarbossa 1996, 2 points). true or false as assigned by the caller. magent does not measure the ECG. Not the Smith ST/S ratio.

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/sgarbossa 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": [
    {
      "concordant_st_depression_v1_v3": "false",
      "concordant_st_elevation_1mm": "false",
      "discordant_st_elevation_5mm": "false"
    },
    {
      "concordant_st_depression_v1_v3": "false",
      "concordant_st_elevation_1mm": "false",
      "discordant_st_elevation_5mm": "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/sgarbossa",
  "items": [
    {
      "components": [
        {
          "factor": "concordant_st_elevation_1mm",
          "points": 0,
          "present": false
        },
        {
          "factor": "concordant_st_depression_v1_v3",
          "points": 0,
          "present": false
        },
        {
          "factor": "discordant_st_elevation_5mm",
          "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": "Sgarbossa EB, Pinski SL, Barbagelata A, et al.",
        "doi": "10.1056/NEJM199602223340801",
        "id": "sgarbossa-1996",
        "pmid": "8559200",
        "source": "N Engl J Med. 1996;334(8):481-487",
        "title": "Electrocardiographic diagnosis of evolving acute myocardial infarction in the presence of left bundle-branch block"
      },
      "formula": "sgarbossa",
      "formula_expression": "Sgarbossa = 5*concordant_st_elevation_1mm + 3*concordant_st_depression_v1_v3 + 2*discordant_st_elevation_5mm; max 10; score_ge_3 iff total >= 3",
      "max_score": 10,
      "score": 0,
      "score_ge_3": false
    },
    {
      "components": [
        {
          "factor": "concordant_st_elevation_1mm",
          "points": 0,
          "present": false
        },
        {
          "factor": "concordant_st_depression_v1_v3",
          "points": 0,
          "present": false
        },
        {
          "factor": "discordant_st_elevation_5mm",
          "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": "Sgarbossa EB, Pinski SL, Barbagelata A, et al.",
        "doi": "10.1056/NEJM199602223340801",
        "id": "sgarbossa-1996",
        "pmid": "8559200",
        "source": "N Engl J Med. 1996;334(8):481-487",
        "title": "Electrocardiographic diagnosis of evolving acute myocardial infarction in the presence of left bundle-branch block"
      },
      "formula": "sgarbossa",
      "formula_expression": "Sgarbossa = 5*concordant_st_elevation_1mm + 3*concordant_st_depression_v1_v3 + 2*discordant_st_elevation_5mm; max 10; score_ge_3 iff total >= 3",
      "max_score": 10,
      "score": 0,
      "score_ge_3": false
    }
  ]
}

Response

Field Type Description
formula string sgarbossa
formula_expression string Exact expression used
score integer Sgarbossa 1996 points 0-10
max_score integer 10
score_ge_3 boolean true iff score ≥ 3 (Sgarbossa 1996: specificity ~90% at this cutoff). Not a diagnosis.
components array Per-criterion points
citation object Sgarbossa et al. NEJM 1996 citation
disclaimer string Not-a-device notice

Example JSON

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

{
  "components": [
    {
      "factor": "concordant_st_elevation_1mm",
      "points": 0,
      "present": false
    },
    {
      "factor": "concordant_st_depression_v1_v3",
      "points": 0,
      "present": false
    },
    {
      "factor": "discordant_st_elevation_5mm",
      "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": "Sgarbossa EB, Pinski SL, Barbagelata A, et al.",
    "doi": "10.1056/NEJM199602223340801",
    "id": "sgarbossa-1996",
    "pmid": "8559200",
    "source": "N Engl J Med. 1996;334(8):481-487",
    "title": "Electrocardiographic diagnosis of evolving acute myocardial infarction in the presence of left bundle-branch block"
  },
  "formula": "sgarbossa",
  "formula_expression": "Sgarbossa = 5*concordant_st_elevation_1mm + 3*concordant_st_depression_v1_v3 + 2*discordant_st_elevation_5mm; max 10; score_ge_3 iff total >= 3",
  "max_score": 10,
  "score": 0,
  "score_ge_3": false
}

Client errors (HTTP 400)

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

HTTP Code When
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

  • TIMI risk score for STEMI — Compute the TIMI risk score for ST-elevation myocardial infarction from published bedside factors at presentation.
  • HEART score — Compute the HEART score as age points plus caller-assigned history, ECG, risk factors, and troponin (each 0-2).

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.
  • 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.