What two values are needed in order to calculate cardiac output (CO)for a ventricle?
A)stroke volume (SV)and heart rate (HR)
B)heart rate (HR)and end-diastolic volume (EDV)
C)stroke volume (SV)and blood pressure (BP)
D)end-diastolic volume (EDV)and end-systolic volume (ESV)

Question

Quizplus · Accepted Answer

Cardiac output (CO) is calculated by multiplying stroke volume (SV) and heart rate (HR), so both values are needed to calculate CO for a ventricle. Choice B is incorrect because end-diastolic volume (EDV) is a measure of the amount of blood in the ventricle before it contracts, but it doesn't take into account the amount of blood ejected during contraction, which is captured by stroke volume. Choice C is also incorrect because blood pressure (BP) is not directly related to cardiac output for a ventricle. Choice D is incorrect because end-systolic volume (ESV) is the amount of blood remaining in the ventricle after it contracts, but it doesn't take into account the amount of blood in the ventricle before contraction, which is captured by end-diastolic volume.

What Two Values Are Needed in Order to Calculate Cardiac