What term describes the blood volume in the ventricle at the end of systole?

What term describes the blood volume in the ventricle at the end of systole?

• A. End diastolic volume
• B. Stroke volume
• C. End systolic volume
• D. Residual volume

Answer: (C)

End-systolic volume is the amount of blood left in the ventricle at the end of systole, after the heart has ejected blood during contraction. It shows how completely the ventricle empties during a beat. This differs from end-diastolic volume, which is the filled ventricular volume at the end of diastole. Stroke volume, the amount pumped out each beat, is the difference between those two volumes (EDV minus ESV). Residual volume isn’t a standard term used for the heart in this context. End-systolic volume changes with contractility and afterload: stronger contraction or lower afterload lowers ESV, while weaker contraction or higher afterload raises it.

End-systolic volume is the amount of blood left in the ventricle at the end of systole, after the heart has ejected blood during contraction. It shows how completely the ventricle empties during a beat. This differs from end-diastolic volume, which is the filled ventricular volume at the end of diastole. Stroke volume, the amount pumped out each beat, is the difference between those two volumes (EDV minus ESV). Residual volume isn’t a standard term used for the heart in this context. End-systolic volume changes with contractility and afterload: stronger contraction or lower afterload lowers ESV, while weaker contraction or higher afterload raises it.