Heart failure with reduced ejection fraction (HFrEF, ) is a form of

heart failure Heart failure (HF), also known as congestive heart failure (CHF), is a syndrome caused by an impairment in the heart's ability to Cardiac cycle, fill with and pump blood. Although symptoms vary based on which side of the heart is affected, HF ...

in which the

ejection fraction An ejection fraction (EF) is the volumetric fraction (or portion of the total) of fluid (usually blood) ejected from a chamber (usually the heart) with each contraction (or heartbeat). It can refer to the cardiac atrium, cardiac ventricle, gall ...

is reduced. This is defined as a

left ventricular A ventricle is one of two large chambers located toward the bottom of the heart that collect and expel blood towards the peripheral beds within the body and lungs. The blood pumped by a ventricle is supplied by an atrium, an adjacent chamber in t ...

(LVEF) of 40% or less. About half of heart failure patients have a reduced ejection fraction. Other types of heart failure are heart failure with mildly reduced ejection fraction (LVEF between 40% and 50%) and

heart failure with preserved ejection fraction Heart failure with preserved ejection fraction (HFpEF) is a form of heart failure in which the ejection fraction – the percentage of the volume of blood ejected from the left ventricle with each heartbeat divided by the volume of blood when the l ...

(LVEF 50% or higher).

References

{{reflist Heart diseases