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Figure 4. Count-based ejection fraction. The ejection fraction (EF) is the percentage of the end-diastolic volume (EDV) that is ejected during systolic contraction. In this example, EDV is 100 ml, end-systolic volume (ESV) is 40 ml and the EF is 60% (A). Assuming that the counts in the LV are proportional to volume the end-diastolic counts (EDC) and end-systolic counts (SC) can be used to calculate the EF (B).

Figure 4. Count-based ejection fraction. The ejection fraction (EF) is the percentage of the end-diastolic volume (EDV) that is ejected during systolic contraction. In this example, EDV is 100 ml, end-systolic volume (ESV) is 40 ml and the EF is 60% (A). Assuming that the counts in the LV are proportional to volume the end-diastolic counts (EDC) and end-systolic counts (SC) can be used to calculate the EF (B).

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