What is the end-systolic volume (ESV)?

End-systolic volume (ESV) refers to the volume of blood that remains in the ventricles of the heart at the end of contraction, specifically after the heart has pumped blood out during systole. It is a crucial parameter in understanding the cardiac cycle and is significant for assessing cardiac function, particularly in terms of stroke volume and overall heart efficiency.

This volume is essential in calculations involving stroke volume, which is the difference between end-diastolic volume (the volume of blood in the ventricle just before contraction) and ESV. By knowing the ESV, healthcare professionals can evaluate how well the heart is functioning and how effectively it pumps blood, providing insights into conditions such as heart failure or other cardiac diseases.

Understanding ESV not only helps in assessing how much blood is left in the heart after it has contracted but also supports the analysis of the heart's overall performance, as it connects to preload and afterload dynamics as well.