Editing End-systolic volume

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'''End-systolic volume''' ('''ESV''') is the volume of blood in a [[Ventricle (heart)|ventricle]] at the end of contraction, or [[Systole (medicine)|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]].
The main factors that affect the end-systolic volume are [[afterload]] and the [[contractility of the heart]].
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==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]]) or SPECT (single photon emission computed tomography).{{citation needed|date=March 2021}}

==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.<ref>{{cite book|last1=Boron|first1=Walter F.|last2=Boulpaep|first2=Emile L. | name-list-style = vanc |title=Medical physiology : a cellular and molecular approach|date=2003|publisher=Saunders|location=Philadelphia, Pa|isbn=0-7216-3256-4|edition=1st | page = 521 }}</ref> The [[stroke volume]] is the difference between the [[end-diastolic volume]] and the end-systolic volume. The end-systolic values in the table below are for the left ventricle:{{citation needed|date=March 2021}}

{{Cardiovascular worksheet}}

The right ventricular end-systolic volume (RVESV) normally ranges between 50 and 100 mL.<ref name=edwards/>

==References==
{{reflist}}

{{Cardiovascular physiology}}

[[Category:Cardiovascular physiology]]


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