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Stroke Volume, Cardiac Output

Calculation


LVOT mm
LVOT VTI cm
HR bpm


SV mL
Normal 60-120 mL
CO L/min
Normal 4-8 L/min
Calculate

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Information

The Doppler VTI method in estimating stroke volume and cardiac output correlates well with results of concurrent thermodilution cardiac output determinations in patients without significant left-sided valvular regurgitation.

SV =
π *
LVOT
2
2 * LVOT VTI
CO =
SV * HR
1000

Variable Definition
Input
LVOT Left ventricular outflow tract diameter (mm)
VTI1 LVOT subvalvular velocity time integral (cm)
HR Heart rate (bpm)
Output
SV Stroke Volume (mL)
CO Cardiac Output (L/min)

References


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