Cardiac Output VTI Calculator

Formula

To calculate the Cardiac Output (CO):

\[ CO = \frac{VTI \times CSA \times HR}{1000} \]

Where:

\(CO\) is the Cardiac Output (L/min)
\(VTI\) is the Velocity Time Integral (cm)
\(CSA\) is the Cross-Sectional Area of the outflow tract (cm²)
\(HR\) is the Heart Rate (beats per minute)

What is Cardiac Output?

Cardiac Output is the volume of blood being pumped by the heart, in particular by the left or right ventricle, in one minute. It is a critical parameter in cardiac physiology and can be indicative of the heart’s efficiency and overall health. The measurement of Cardiac Output is essential in diagnosing and managing various cardiac conditions.

Example Calculation 1

Let's assume the following values:

VTI = 20 cm
CSA = 3 cm²
HR = 75 beats per minute

Using the formula:

\[ CO = \frac{20 \times 3 \times 75}{1000} = 4.50 \text{ L/min} \]

The Cardiac Output is 4.50 L/min.

Example Calculation 2

Let's assume the following values:

VTI = 25 cm
CSA = 2.5 cm²
HR = 80 beats per minute

Using the formula:

\[ CO = \frac{25 \times 2.5 \times 80}{1000} = 5.00 \text{ L/min} \]

The Cardiac Output is 5.00 L/min.