Given a stroke volume of 40 ml and an end-diastolic volume (EDV) of 70 ml, what is the pa-tient's ejection fraction (EF)?
a. 0.57
b. 1.75
c. 67
d. 2800
ANS: A
Given a stroke volume of approximately 40 ml, and an EDV of 70 ml, the ejection fraction can be calculated as follows:
EF = SV/EDV= 40 ml/70 ml = 0.57, or 57%.
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