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End-systolic volume: Wikis

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End-systolic volume (ESV) is the volume of blood in the left ventricle at the end of contraction, or systole, and the beginning of filling, or diastole.

ESV is the lowest volume of blood in the ventricle at any point in the cardiac cycle.

Contents

Uses

End systolic volume can be used clinically as a measurement of the adequacy of cardiac emptying, related to systolic function. On an electrocardiogram, or ECG, the end-systolic volume will be seen at the end of the T wave. Clinically, ESV can be measured using two-dimensional echocardiography, MRI (magnetic resonance tomography) or cardiac CT (=computed tomography).

Sample values

Along with end-diastolic volume, ESV determines the stroke volume, or output of blood by the heart during a single phase of the cardiac cycle.[1] The stroke volume is the difference between the end-diastolic volume and the end-systolic volume.

Parameter Value
end-diastolic volume (EDV) 120 ml
end-systolic volume (ESV) 50 ml
stroke volume (SV) 70 ml
ejection fraction (Ef) 58%
heart rate (HR) 70 bpm
cardiac output (CO) 4.9 L/m

References

  1. ^ Boron and Boulpaep 2005 Medical Physiology Updated Edition p521 ISBN 0721632564

See also

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