Question

How do you calculate stroke volume and ejection fraction?

A) Stroke volume = End-diastolic volume - End-systolic volume; Ejection fraction = Stroke volume / End-diastolic volume
B) Stroke volume = End-diastolic volume + End-systolic volume; Ejection fraction = End-systolic volume / End-diastolic volume
C) Stroke volume = End-diastolic volume * End-systolic volume; Ejection fraction = Stroke volume - End-diastolic volume
D) Stroke volume = End-systolic volume - End-diastolic volume; Ejection fraction = End-diastolic volume / Stroke volume

Answer 1

Stroke volume is calculated by subtracting the end-systolic volume from the end-diastolic volume. Ejection fraction is calculated by dividing the stroke volume by the end-diastolic volume.

Step-by-step explanation:

To calculate stroke volume (SV), you subtract the end-systolic volume (ESV) from the end-diastolic volume (EDV). So, SV = EDV - ESV. To calculate the ejection fraction, you divide the stroke volume by the end-diastolic volume. So, ejection fraction = SV / EDV.

For example, if the end-diastolic volume is 130 mL and the end-systolic volume is 60 mL, the stroke volume would be 70 mL (130 mL - 60 mL). If you divide the stroke volume of 70 mL by the end-diastolic volume of 130 mL, you will get an ejection fraction of approximately 53.8%.