What is ejection fraction?

Ejection Fraction

In cardiovascular physiology, ejection fraction (EF) represents the volumetric fraction of blood pumped out of the ventricle (heart) with each heart beat or cardiac cycle. It can be applied to either the right ventricle which ejects via the pulmonary valve into the pulmonary circulation or the left ventricle which ejects via the aortic valve into the systemic circulation.

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Some articles on ejection fraction:

Dor Procedure - Indications
... fiber orientation, which is critical to a good ejection fraction, becomes transverse, or more horizontal ... Subsequently, the ejection fraction decreases a 15% shortening produces only a 30% ejection fraction ... Viable/Nonviable myocardial mass fraction is substantially reduced by surgical interventions such as Dor and Batista ...
Injection Fraction
... In cardiovascular physiology, ejection fraction (EF) represents the volumetric fraction of blood pumped out of the ventricle (heart) with each heart beat or cardiac cycle ... Simplified, Ejection fraction is a mathematical product allowed by cardiac imaging ... As a mathematical term, Ejection Fraction is an extension of the work of Adolph Fick in cardiac output ...
Ejection Fraction - Measurement
... Ejection fraction is commonly measured by echocardiography, in which the volumes of the heart's chambers are measured during the cardiac cycle ... Ejection fraction can then be obtained by dividing stroke volume by end-diastolic volume as described above ... Other methods of measuring ejection fraction include cardiac MRI, fast scan cardiac computed axial tomography (CT) imaging, ventriculography, Gated SPECT ...
Cardiac Input - Clinical Uses
... A parameter related to SV is Ejection Fraction (EF) ... EF is the fraction of blood ejected by the Left Ventricle (LV) during the contraction or ejection phase of the cardiac cycle or Systole ... Stroke Volume (SV) = EDV – ESV Ejection Fraction (EF) = (SV / EDV) × 100% Cardiac Output (Q) = SV × HR Cardiac Index (CI) = Q / Body Surface Area (BSA) = SV × HR/BSA HR is Heart Rate ...

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