Ejection Fraction Calculator

Ejection Fraction is most commonly measured using Echocardiography. This non-invasive technique provides good estimates of end-diastolic (EDV) and end-systolic volumes (ESV), and stroke volume (SV = EDV-ESV). Normally, EF is >60%. For example, if the SV is 75 ml and the EDV is 120 ml, then the EF is 63%. During exercise in highly conditioned individuals, the increased stroke volume (caused primarily by increased inotropy) can result in the EF exceeding 90%. Therefore, EF = (SV / EDV) * 100 where SV = stroke volume, EDV = end-diastolic volume