What is the normal value for cardiac ejection fraction (EF)?

EF refers to the left ventricular ejection fraction—the ratio of the volume of blood pumped out by the left ventricle during each cardiac cycle to its end-diastolic volume. So, what is the normal EF value for cardiac function?

What is the Normal EF Value for Cardiac Function?

The normal range for cardiac EF is 50%–70%. EF (ejection fraction) reflects the proportion of blood ejected by the heart with each contraction relative to its end-diastolic volume. An EF value below 50% suggests heart failure. EF is a critical indicator for assessing cardiac function. Patients with heart failure can be classified into two main types: heart failure with reduced ejection fraction (HFrEF) and heart failure with preserved ejection fraction (HFpEF). When EF is ≥50%, it falls under HFpEF. Common symptoms of heart failure include fatigue, shortness of breath upon exertion, severe coughing with pink frothy sputum, and orthopnea (breathlessness while lying flat).

On echocardiography, EF is typically measured using the biplane Simpson’s method, representing the ratio of ventricular stroke volume to end-diastolic volume—thereby reflecting ventricular systolic (ejection) function from a volumetric perspective. EF specifically indicates the contractile pumping capacity of the ventricles. Greater myocardial contractility leads to higher stroke volume and thus a higher ejection fraction. Consequently, in patients with heart failure, left ventricular ejection fraction is significantly reduced. In certain special clinical scenarios, right ventricular or left atrial ejection fractions may also be assessed.

Additionally, if symptoms arise, prompt medical evaluation at a hospital is strongly recommended, followed by appropriate management under physician guidance. We hope this information has been helpful!