<prompt> Ejection fraction denotes performance of-Left ventricleLeft atriumAoic valvePulmonary valve  <response>: ejection fraction EF is the fraction of blood ejected from a ventricle of the hea with each hea beat .It is a direct indicater of left ventricular function EJECTION FRACTION The volume of blood within a ventricle immediately before a contraction is known as the end-diastolic volume. The volume of blood left in a ventricle at the end of contraction is end-systolic volume. The difference between end-diastolic volume EDV and end-systolic volumes ESV is the stroke volume, the volume of blood ejected with each beat. Ejection fraction Ef is the fraction of the end-diastolic volume that is ejected with each beat; that is, it is stroke volume SV divided by end-diastolic volume EDV Ref : Harrison 20th edition pg 1437 