Ejection Fraction [ESV,EDV]

The Ejection Fraction calculator computes the Ejection Fraction based on the end-systolic and end-diastolic volumes.

INSTRUCTIONS: Choose units and enter the following:

• (EDV) End-Diastolic Volume
• (ESV) Systolic Volume

Ejection Fraction (E_f): The calculator returns the fraction as a percentage.

The Math / Science

Ejection Fraction (EF) is the fraction of blood ejected by the Left Ventricle (LV) during the contraction or ejection phase of the cardiac cycle or Systole. `E_f` is commonly measured by echocardiography, in which the volumes of the heart's chambers are measured during the cardiac cycle.  The Ejection Fraction equation is:

      E_f =  (EDV - ESV) / EDV

where: 

• E_f = Ejection Fraction
• ESV = End-Systolic Volume
• EDV = End-Diastolic Volume

 
In cardiovascular physiology, ejection fraction (E_F) represents the volumetric fraction of blood pumped out of the left and right ventricle with each heartbeat or cardiac cycle. In finite mathematics allowed by medical imaging, E_F is applied to both the right ventricle, which ejects blood via the pulmonary valve into the pulmonary circulation, or the left ventricle, which ejects blood via the aortic valve into the cerebral and systemic circulation.

Systolic and Diastolic Volume

End Diastolic Volume (EDV)  is the volume of the ventricle before the heart contracts.  End Systolic Volume (ESV) is the ventricle volume after blood has been ejected from the heart.

 The typical end diastolic volume for a the average male is 120 milliliters of blood, and 50 milliliters of end-systolic blood.  

Heart and Cardiology Calculators

• Cardiac Stroke Volume: Computes the volume blood pumped in one stroke based on the end diastolic and systolic volumes.
• Cardiac Output: Computes the output of a heart based on the heart rate, end diastolic volume and the end systolic volume.
• Cardiac Output with Stroke Volume: Computes the volume rate of blood pumped by the heart in one minute based on the beats per minute and the stroke volume.
• Ejection Fraction: Computes the Ejection Fraction percentage based on the end-systolic and end-diastolic volumes.
• Heart Stroke Work: Computes the amount of work performed by the heart during a single heartbeat to pump blood based on the Mean Arterial Pressure (MAP) and Stroke Volume(SV).
• Mean Arterial Press: Compute the mean arterial pressure and pulse pressure based on the diastolic pressure and the systolic pressure.
• Cardiac Stroke Work: Computes work done by the ventricle to eject a volume of blood into the aorta based on the afterload pressure, stroke volume, blood stroke mass and blood flow velocity.
• Cardiac Flow (Q): Computes the flow factor of an artery based on the diameter and blood flow velocity.
• Body Surface Area (BSA): Wide range of calculators in one function to compute the body surface area base on one of many common methods (e.g., Mosteller, Takahira)