Ejection fraction
（重定向自Left ventricular Ejection Fraction）
![Ejection fraction is the amount of blood pumped by the heart with each cardiac cycle.](/Images/godic/202501/23/Heart_Beating_Animation5748.gif")
Ejection fraction (EF) is the fraction of outbound blood pumped from the heart with each heartbeat. It is commonly measured by echocardiogram and serves as a general measure of a person's cardiac function. Ejection fraction is typically low in patients with systolic congestive heart failure.