Stroke volume is defined as what?

Stroke volume is defined as what?

• A. The amount of blood ejected with each heartbeat
• B. The total blood pumped per minute
• C. The pressure within the arteries during systole
• D. The amount of blood in the ventricle at rest

Answer: (A)

Stroke volume is the amount of blood ejected from the ventricle with each heartbeat. It can be understood as the difference between how much blood fills the ventricle (end-diastolic volume) and how much remains after the ventricle contracts (end-systolic volume): SV = EDV − ESV. This distinguishes it from cardiac output, which is the total blood pumped per minute and equals stroke volume times heart rate. It’s not the pressure inside the arteries during systole (that’s systolic pressure), and it’s not simply the amount of blood in the ventricle at rest (which is a filling volume, not what gets pumped each beat).

Stroke volume is the amount of blood ejected from the ventricle with each heartbeat. It can be understood as the difference between how much blood fills the ventricle (end-diastolic volume) and how much remains after the ventricle contracts (end-systolic volume): SV = EDV − ESV. This distinguishes it from cardiac output, which is the total blood pumped per minute and equals stroke volume times heart rate. It’s not the pressure inside the arteries during systole (that’s systolic pressure), and it’s not simply the amount of blood in the ventricle at rest (which is a filling volume, not what gets pumped each beat).