Health

Left Ventricular Ejection Fraction Estimator (LVEF)

Compute LVEF = (EDV − ESV) / EDV. Normal 50–70%; <40% HFrEF; >70% hyperdynamic. Derived from Lang JASE 2015, Ponikowski ESC 2016, StatPearls, LITFL, Braunwald. Not medical advice.

json· JSON resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL

curl -X POST 'https://api.elysiatools.com/en/api/tools/ejection-fraction-estimator' \
  -H 'Content-Type: application/json' \
  -d '{"edv":120,"esv":48,"decimalPlaces":1}'

API reference

Send a POST request with your inputs as JSON. File parameters require a separate upload first.

Endpoint

HTTP

POST https://api.elysiatools.com/en/api/tools/ejection-fraction-estimator

Parameters

Name	Type	Required	Description
edv	number	Yes	Left ventricular end-diastolic volume (mL) from echo/MRI/angiography.
esv	number	Yes	Left ventricular end-systolic volume (mL). Must be ≤ EDV.
decimalPlaces	number	No	—

Response format

JSON result

JSON

{
  "key": {...},
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}

MCP integration

Add this tool to your Model Context Protocol server so AI agents can list and call it.

Server configuration

Add this block to your MCP client configuration:

mcp.json

{
  "mcpServers": {
    "elysiatools-ejection-fraction-estimator": {
      "name": "ejection-fraction-estimator",
      "description": "Compute LVEF = (EDV − ESV) / EDV. Normal 50–70%; <40% HFrEF; >70% hyperdynamic. Derived from Lang JASE 2015, Ponikowski ESC 2016, StatPearls, LITFL, Braunwald. Not medical advice.",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=ejection-fraction-estimator",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

List available tools

After connecting to the SSE endpoint, list the exposed tools:

tools/list

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/list"
}

Call this tool

Invoke the tool by its id, passing arguments built from its parameters:

tools/call

{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "tools/call",
  "params": {
    "name": "ejection-fraction-estimator",
    "arguments": {
  "edv": 120,
  "esv": 48,
  "decimalPlaces": 1
}
  }
}

Chain multiple tools in one session with a comma-separated toolId list, e.g. /mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp (max 20).

Questions or issues? Contact [email protected]

Browse tools Open tool

Name

Type

Required

Description

edv

number

Yes

Left ventricular end-diastolic volume (mL) from echo/MRI/angiography.

esv

number

Yes

Left ventricular end-systolic volume (mL). Must be ≤ EDV.

decimalPlaces

number

—

{ "mcpServers": { "elysiatools-ejection-fraction-estimator": { "name": "ejection-fraction-estimator", "description": "Compute LVEF = (EDV − ESV) / EDV. Normal 50–70%; <40% HFrEF; >70% hyperdynamic. Derived from Lang JASE 2015, Ponikowski ESC 2016, StatPearls, LITFL, Braunwald. Not medical advice.", "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=ejection-fraction-estimator", "command": "", "args": [], "env": {}, "isActive": true, "type": "sse" } } }