Cardiac Output Echocardiogram Calculator

This calculator estimates cardiac output (CO) from echocardiogram measurements, commonly used in clinical settings to assess heart function

Input Parameters

If provided, the calculator will display an alternative LVEF-based calculation

Calculation Results

Calculation Results

Enter the input parameters and click "Calculate" to see results

Calculation Formula

Cardiac Output (CO) = Heart Rate (HR) × Stroke Volume (SV)

Where:
CO: Cardiac Output (L/min)
HR: Heart Rate (beats per minute)
SV: Stroke Volume (mL/beat)

Cardiac Output Echocardiogram Calculator Calculator Usage Guide

Learn how to use the Cardiac Output Echocardiogram Calculator and its working principles

How to Use This Calculator

  1. Enter your heart rate in beats per minute (bpm). A typical resting heart rate for adults is 60-100 bpm.
  2. Enter your stroke volume in milliliters per beat (mL/beat). This value can be obtained from echocardiogram measurements.
  3. Optionally, enter the Left Ventricular Ejection Fraction (LVEF) if available. LVEF represents the percentage of blood ejected from the left ventricle with each heartbeat.
  4. Click the "Calculate" button to compute your cardiac output.
  5. The calculator will display two results if LVEF is provided: one based on the standard formula (HR × SV) and one based on the LVEF formula.

Understanding Cardiac Output

Cardiac Output (CO) is the volume of blood being pumped by the heart per minute. It's a critical measure of heart function and can be calculated using the formula:

CO = Heart Rate × Stroke Volume

Alternatively, if the LVEF is known:

CO = 1.334 × LVEF (%) × Stroke Volume

Normal Ranges

  • Normal Cardiac Output for adults: 4.0-8.0 L/min
  • Normal Heart Rate: 60-100 bpm
  • Normal Stroke Volume: 60-120 mL/beat
  • Normal LVEF: 50-70%

Practical Applications

This calculator is particularly useful for:

  • Assessing heart function in patients with heart disease
  • Monitoring patients during surgery or critical care
  • Evaluating the effectiveness of heart medications
  • Comparing different measurement techniques

Limitations

Keep in mind that this calculator provides estimates based on standard formulas. Clinical interpretation should always be made by qualified healthcare professionals considering the full clinical context.