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.

Imaging of the physiology of the mammalian heart is the art that allows meaningful mathematical expression defining EF. Noninvasive cardiac imaging has become a worldwide utility enabling study of cardiac performance noninvasively, reproducibly and inexpensively. 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. Dedicated technology such as Echocardiography, Computed Tomography, Magnetic Resonance Imaging and MUGA scanning have definitively allowed clinically relevant mathematics regarding Ischemia, Congenital Heart Disease and Heart Failure.

RVEF and LVEF may vary widely from one another incumbent upon physiologic state. Ventricular dyssynchrony represents theoretical pathology in which the LVEF and RVEF combined may be less than 100%. Without a qualifier, the term ejection fraction basically refers to the blood output of the left ventricle.

Read more about Ejection FractionOverview, Normal Values, Measurement

Other articles related to "ejection fraction, fraction, ejection":

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 ...
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, expressed as BPM (Beats Per ...
Dor Procedure - Indications
... 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 ...
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, and the ...

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