Normal LVEF Range
May 23, 2022
Source: Cainiu Health
Dr. Li Man
Introduction
Left Ventricular Ejection Fraction (LVEF) refers to the percentage of blood pumped out of the left ventricle with each contraction relative to the left ventricular end-diastolic volume. It is a key indicator of cardiac function, with a normal range of 50%–70%. In advanced heart failure, myocardial function becomes impaired and cardiac function deteriorates. An LVEF below 50% warrants evaluation for ischemic heart disease.
LVEF stands for left ventricular ejection fraction. LVEF is a key echocardiographic parameter used to assess cardiac function. A low LVEF may indicate symptoms such as heart failure.
Normal LVEF Range
Cardiac LVEF refers to the left ventricular ejection fraction, with a normal range of 50%–70%. It is one of the most important indicators of cardiac function, representing the percentage of blood ejected by the left ventricle with each contraction relative to its end-diastolic volume.
In advanced stages of various types of heart failure, myocardial function becomes impaired and cardiac performance deteriorates. An LVEF below 50% warrants further investigation for potential underlying causes such as ischemic heart disease, dilated cardiomyopathy, or hypertensive heart disease. Identifying and treating the root cause can improve cardiac function and restore LVEF to normal levels.
Ejection fraction (EF) is defined as the ratio of stroke volume—the amount of blood pumped out by the heart in one beat—to the end-diastolic volume of the ventricle. In healthy adults at rest, the left ventricular end-diastolic volume is approximately 145 mL, and stroke volume ranges from 60–80 mL—meaning that some residual blood remains in the ventricle after each contraction. Clinically, cardiac function is commonly assessed using EF, which correlates directly with myocardial contractility: stronger myocardial contraction yields greater stroke volume and thus a higher EF. A normal left ventricular ejection fraction exceeds 50%.
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