Injection fraction

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Injection fraction is the inverse operation of the myocardial ejection fraction. Ejection fraction (EF) is most readily appreciated as the difference between end-diastolic and end-systolic volumes. Mathematical derivation as stroke volume and minV similarly apply as determinants of Systole.

Determinants of Diastole imply an inverse mathematical approach to the work of Systole. Injection fraction as a determinant of diastole is the difference between end-systolic and end-diastolic volume. IF declines sharply with decreases in myocardial compliance, blood ischemia and/or electrical myocardial ischemia.^{[citation needed]}