The end-systolic volume is
A) the volume of blood in the ventricle when ejection is complete.
B) the volume of blood in the ventricle when filling is complete.
C) always equal to the stroke volume.
D) the volume of blood in the ventricle when ejection is complete and always equal to the stroke volume.
E) the volume of blood in the ventricle when filling is complete and always equal to the stroke volume.

Question

Quizplus · Accepted Answer

The end-systolic volume (ESV) is the volume of blood remaining in the ventricle after ejection is complete. It is the lowest volume of blood in the ventricle during the cardiac cycle and is typically around 50 mL in a healthy adult heart. The ESV is important for calculating the ejection fraction, which is a measure of the heart's efficiency in pumping blood out of the ventricle. The stroke volume (SV) is the difference between the end-diastolic volume (EDV) and ESV, so the ESV is not always equal to the SV.

The End-Systolic Volume Is