Cardiac and Stroke Volume Index Calculator

Height:

Weight:

Cardiac Output:

Heart Rate:

Body Surface Area (m²): Stroke Volume (ml): Cardiac Index (L/min/m²): Stroke Volume Index (ml/m²): Stroke Volume Index (ml/in²): Stroke Volume Index (ml/cm²):

1. What is a Cardiac and Stroke Volume Index Calculator?

Definition: This calculator determines the Body Surface Area (BSA), Stroke Volume (SV), Cardiac Index (CI), and Stroke Volume Index (SVI) based on height, weight, cardiac output, and heart rate.

Purpose: Useful for assessing cardiac performance normalized to body size.

2. How Does the Calculator Work?

The calculations are based on the following formulas:

\[ \text{BSA (m²)} = 0.007184 \times \text{Height (cm)}^{0.725} \times \text{Weight (kg)}^{0.425} \]

\[ \text{Stroke Volume (ml)} = \frac{\text{Cardiac Output (L/min)} \times 1000}{\text{Heart Rate (bpm)}} \]

\[ \text{Cardiac Index (L/min/m²)} = \frac{\text{Cardiac Output (L/min)}}{\text{BSA (m²)}} \]

\[ \text{Stroke Volume Index (ml/m²)} = \frac{\text{Stroke Volume (ml)}}{\text{BSA (m²)}} \]

Unit Conversions:

Height: cm (direct), m (×100), ft (×30.48), in (×2.54)
Weight: kg (direct), g (×0.001), lb (×1/453.592), oz (×1/28.3495)
Cardiac Output: L/min (direct), ml/min (×0.001)
Stroke Volume Index: ml/m² (direct), ml/in² (×1/1550), ml/cm² (×1/10000)

Explanation: Inputs are converted to cm (height), kg (weight), and L/min (cardiac output), then used to calculate BSA, SV, CI, and SVI with conversions to additional SVI units.

3. Importance of Cardiac and Stroke Volume Index

Details: These indices normalize cardiac output and stroke volume to body size, aiding in the diagnosis and comparison of cardiovascular health.

4. Using the Calculator

Tips: Enter height (cm, m, ft, in), weight (kg, g, lb, oz), cardiac output (L/min, ml/min), and heart rate (bpm) (all >0). Results include BSA (m²), SV (ml), CI (L/min/m²), and SVI (ml/m², ml/in², ml/cm²).

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