What term refers to the volume of blood in the ventricles at the end of filling?

What term refers to the volume of blood in the ventricles at the end of filling?

• A. End-systolic volume
• B. Stroke volume
• C. End-diastolic volume
• D. Tidal volume

Answer: (C)

End-diastolic volume is the term that accurately describes the volume of blood present in the ventricles at the end of the filling phase, just before the ventricles contract. This measurement is crucial in understanding the heart's function because it reflects the amount of blood available for ejection during the next heartbeat. The higher the end-diastolic volume, generally, the more blood the heart can pump, thereby influencing cardiac output. In the context of cardiac cycle phases, end-diastolic volume occurs after the heart has filled with blood during diastole, making it a key indicator of ventricular preload. Understanding this concept is vital for evaluating cardiac performance and can have implications in various medical conditions.

End-diastolic volume is the term that accurately describes the volume of blood present in the ventricles at the end of the filling phase, just before the ventricles contract. This measurement is crucial in understanding the heart's function because it reflects the amount of blood available for ejection during the next heartbeat. The higher the end-diastolic volume, generally, the more blood the heart can pump, thereby influencing cardiac output.

In the context of cardiac cycle phases, end-diastolic volume occurs after the heart has filled with blood during diastole, making it a key indicator of ventricular preload. Understanding this concept is vital for evaluating cardiac performance and can have implications in various medical conditions.