Stroke volume is the amount of blood ejected by the ventricle in one contraction. It is most closely associated with which chamber?

Stroke volume is the amount of blood ejected by the ventricle in one contraction. It is most closely associated with which chamber?

• A. Left ventricle
• B. Right ventricle
• C. Atria
• D. Interventricular septum

Answer: (A)

Stroke volume is the amount of blood ejected by a ventricle during one contraction. While both ventricles perform this action, the chamber most closely tied to this concept in normal physiology and clinical context is the left ventricle. It generates the high pressure needed to propel blood through the systemic circulation via the aorta, so its stroke volume largely determines systemic perfusion. The right ventricle also ejects blood, but into the lower-pressure pulmonary circulation, making the left ventricle the primary reference for stroke volume. Atria do not eject blood in the same sense, and the interventricular septum is just the wall between the ventricles.

Stroke volume is the amount of blood ejected by a ventricle during one contraction. While both ventricles perform this action, the chamber most closely tied to this concept in normal physiology and clinical context is the left ventricle. It generates the high pressure needed to propel blood through the systemic circulation via the aorta, so its stroke volume largely determines systemic perfusion. The right ventricle also ejects blood, but into the lower-pressure pulmonary circulation, making the left ventricle the primary reference for stroke volume. Atria do not eject blood in the same sense, and the interventricular septum is just the wall between the ventricles.