Tisdale 2013 QT prolongation risk score (Table 5)

Tisdale 2013 QT prolongation risk score (Table 5): age ≥68 (1), female (1), loop diuretic (1), potassium ≤3.5 mmol/L (2), admission QTc ≥450 ms (2), acute MI (2), sepsis (3), heart failure (3), one QTc-prolonging drug (3) plus ≥2 drugs (3 stacked; max 21). Returns bands 0-6 / 7-10 / ≥11. Deterministic published arithmetic with citation; not a medical device, not a drug-stop protocol, and not a TdP diagnosis.

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Endpoint

POST https://api.magentlab.com/api/calc/tisdale

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Example input (from the provider)

{
  "body": {
    "items": [
      {
        "acute_mi": false,
        "admission_qtc_ms": 400,
        "age": 60,
        "heart_failure": false,
        "loop_diuretic": false,
        "potassium_mmol_l": 4,
        "qtc_prolonging_drugs": 0,
        "sepsis": false,
        "sex": "male"
      },
      {
        "acute_mi": false,
        "admission_qtc_ms": 400,
        "age": 60,
        "heart_failure": false,
        "loop_diuretic": false,
        "potassium_mmol_l": 4,
        "qtc_prolonging_drugs": 0,
        "sepsis": false,
        "sex": "male"
      }
    ]
  },
  "method": "POST",
  "type": "http"
}

Promised output schema (from the provider)

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "body": {
          "additionalProperties": false,
          "properties": {
            "items": {
              "items": {
                "properties": {
                  "acute_mi": {
                    "description": "Acute myocardial infarction (Tisdale 2013 Table 5). true or false. Scores 2 if true.",
                    "type": "boolean"
                  },
                  "admission_qtc_ms": {
                    "description": "Admission QTc in milliseconds (200-800). \u2265450 scores 2 (Tisdale 2013 Table 5). 450 scores.",
                    "type": "number"
                  },
                  "age": {
                    "description": "Age in years (18-120). Age \u226568 scores 1 (Tisdale 2013 Table 5). 67 does not score.",
                    "type": "integer"
                  },
                  "heart_failure": {
                    "description": "Left ventricular dysfunction / heart failure (Tisdale 2013 Table 5). true or false. Scores 3 if true.",
                    "type": "boolean"
                  },
                  "loop_diuretic": {
                    "description": "Loop diuretic (Tisdale 2013 Table 5). true or false. Scores 1 if true.",
                    "type": "boolean"
                  },
                  "potassium_mmol_l": {
                    "description": "Serum potassium in mmol/L (1.5-8.0). \u22643.5 scores 2 (Tisdale 2013 Table 5). 3.5 scores; 3.51 does not.",
                    "type": "number"
                  },
                  "qtc_prolonging_drugs": {
                    "description": "Count of QTc-prolonging drugs (integer 0-20). 0 \u2192 0 points; 1 \u2192 3 points; \u22652 \u2192 6 points (Table 5 one-drug and \u22652-drug rows stack).",
                    "type": "integer"
                  },
                  "sepsis": {
                    "description": "Sepsis (Tisdale 2013 Table 5). true or false. Scores 3 if true.",
                    "type": "boolean"
                  },
                  "sex": {
                    "description": "female scores 1; male scores 0 (Tisdale 2013 Table 5).",
                    "enum": [
                      "female",
                      "male"
                    ],
                    "type": "string"
                  }
                },
                "required": [
                  "age",
                  "sex",
                  "loop_diuretic",
                  "potassium_mmol_l",
                  "admission_qtc_ms",
                  "acute_mi",
                  "sepsis",
                  "heart_failure",
                  "qtc_prolonging_drugs"
                ],
                "type": "object"
              },
              "maxItems": 25,
              "minItems": 1,
              "type": "array"
            }
          },
          "required": [
            "items"
          ],
          "type": "object"
        },
        "headers": {
          "additionalProperties": {
            "type": "string"
          },
          "type": "object"
        },
        "method": {
          "const": "POST",
          "type": "string"
        },
        "type": {
          "const": "http",
          "type": "string"
        }
      },
      "required": [
        "type",
        "method"
      ],
      "type": "object"
    },
    "output": {
      "properties": {
        "example": {
          "type": "object"
        },
        "type": {
          "type": "string"
        }
      },
      "required": [
        "type"
      ],
      "type": "object"
    }
  },
  "required": [
    "input"
  ],
  "type": "object"
}

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