The Cardiac Stroke Volume Index (SVI) is a vital hemodynamic parameter used to assess the heart's pumping efficiency relative to body size. It helps medical professionals evaluate cardiovascular function, fluid status, and guide treatment in critical care settings. Use our free SVI calculator for quick and accurate results.
Formula:
The Cardiac Stroke Volume Index (SVI) is calculated using the following formula:
SVI = SV / BSA
Where:
- SV (Stroke Volume) = Volume of blood pumped by the left ventricle per beat (mL)
- BSA (Body Surface Area) = Total surface area of the human body (m2)
Stroke Volume (SV) is derived from Cardiac Output (CO) and Heart Rate (HR):
SV = (CO ⋆ 1000) / HR
And Body Surface Area (BSA) is calculated using the Du Bois formula:
BSA = 0.007184 ⋆ Weight(kg)0.425 ⋆ Height(cm)0.725