Final answer:
The stroke volume is calculated by subtracting the end systolic volume from the end diastolic volume; for an EDV of 135 mL and ESV of 60 mL, the stroke volume is 75 mL.
Step-by-step explanation:
To calculate the stroke volume (SV), you simply subtract the end systolic volume (ESV) from the end diastolic volume (EDV). Given that the EDV is 135 mL and the ESV is 60 mL, the calculation would be as follows:
SV = EDV - ESV
SV = 135 mL - 60 mL
SV = 75 mL
This result means that the individual's heart pumps 75 mL of blood per beat. SV can vary based on factors such as the size of the heart, the individual's physical and mental condition, sex, heart contractility, duration of contraction, and resistance. It is normally measured using an echocardiogram and can also be critical for calculating the ejection fraction, which is the percentage of blood pumped out of the ventricles with each heartbeat.