<P> 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). </P> <P> 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 . 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: </P> <Table> <Tr> <Th_colspan="3"> Ventricular volumes <Ul> <Li> view </Li> <Li> talk </Li> <Li> </Li> </Ul> </Th> </Tr> <Tr> <Th> Measure </Th> <Th> Right ventricle </Th> <Th> Left ventricle </Th> </Tr> <Tr> <Td> End - diastolic volume </Td> <Td> 144 mL (± 23mL) </Td> <Td> 142 mL (± 21 mL) </Td> </Tr> <Tr> <Td> End - diastolic volume / body surface area (mL / m) </Td> <Td> 78 mL / m (± 11 mL / m) </Td> <Td> 78 mL / m (± 8.8 mL / m) </Td> </Tr> <Tr> <Td> End - systolic volume </Td> <Td> 50 mL (± 14 mL) </Td> <Td> 47 mL (± 10 mL) </Td> </Tr> <Tr> <Td> End - systolic volume / body surface area (mL / m) </Td> <Td> 27 mL / m (± 7 mL / m) </Td> <Td> 26 mL / m (± 5.1 mL / m) </Td> </Tr> <Tr> <Td> Stroke volume </Td> <Td> 94 mL (± 15 mL) </Td> <Td> 95 mL (± 14 mL) </Td> </Tr> <Tr> <Td> Stroke volume / body surface area (mL / m) </Td> <Td> 51 mL / m (± 7 mL / m) </Td> <Td> 52 mL / m (± 6.2 mL / m) </Td> </Tr> <Tr> <Td> Ejection fraction </Td> <Td> 66% (± 6%) </Td> <Td> 67% (± 4.6%) </Td> </Tr> <Tr> <Td> Heart rate </Td> <Td> 60--100 bpm </Td> <Td> 60--100 bpm </Td> </Tr> <Tr> <Td> Cardiac output </Td> <Td> 4.0--8.0 L / minute </Td> <Td> 4.0--8.0 L / minute </Td> </Tr> </Table> <Tr> <Th_colspan="3"> Ventricular volumes <Ul> <Li> view </Li> <Li> talk </Li> <Li> </Li> </Ul> </Th> </Tr>

End-diastolic volume for each ventricle during rest is normally about
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