Stroke Volume Equations and Definitions

Stroke Volume Equation

Definition of Stroke Volume

  • Stroke Volume (SV): The amount of blood pumped by the left ventricle of the heart in one contraction.

Stroke Volume Equations

  • Two Primary Equations for Stroke Volume:

    1. First Equation: Stroke Volume can be calculated using the following formula:
      SV=CsaimesVTISV = Csa imes VTI
    • Csa: Cross-sectional area of the aorta.
    • VTI (Velocity Time Integral): The distance that a volume of blood travels over a given time during systole.
    1. Second Equation: The stroke volume can also be expressed as:
      SV=EDV−ESVSV = EDV - ESV
    • EDV (End Diastolic Volume): The total amount of blood in the ventricle at the end of filling (diastole).
    • ESV (End Systolic Volume): The remaining volume of blood in the ventricle after contraction (systole).

Implications of Stroke Volume Calculation

  • Understanding stroke volume is crucial for evaluating heart function and cardiac output, which is fundamental in various medical contexts including heart disease, heart failure management, and assessing cardiovascular health.