Question

Given the following data, calculate the LVEF:

net counts, end diastole: 20,582
net counts, end systole: 44,653

a. 18.5%
b. 46.1%
c. 53.9%
d. 68.5%

Answer 1

To calculate the LVEF, subtract the end systolic volume (ESV) from the end diastolic volume (EDV) to get the stroke volume (SV). Then, use the formula LVEF = (SV / EDV) x 100% to calculate the LVEF. In this case, the LVEF is approximately 117%.

Step-by-step explanation:

To calculate the left ventricular ejection fraction (LVEF), you need to know the stroke volume (SV) and the end diastolic volume (EDV). The formula is LVEF = (SV / EDV) x 100%. SV can be calculated by subtracting the end systolic volume (ESV) from the EDV. In this case, the SV would be 44653 - 20582 = 24071 net counts. Given that SV and EDV, the LVEF can be calculated as (24071 / 20582) x 100%, which is approximately 116.87%. However, since the LVEF is normally expressed as a percentage, the answer should be rounded to the nearest whole number. Therefore, the LVEF would be approximately 117%.