Learn about cardiac ejection fraction and its normal range for different age groups.
The heart is the body’s “engine,” continuously pumping blood to deliver oxygen and nutrients throughout the body. Left Ventricular Ejection Fraction (LVEF or EF) is a key indicator used to assess the heart’s systolic (contracting) function. It represents the percentage of blood pumped out of the left ventricle (the heart’s main pumping chamber) with each heartbeat.Simply put, if the left ventricle holds 100 ml of blood and pumps out 60 ml per beat, the ejection fraction is 60%. This value directly reflects how efficiently the heart is pumping and serves as an important metric for diagnosing heart failure and evaluating cardiac health.
Ejection fraction (EF) is a measurement expressed as a percentage that indicates how much blood the left ventricle pumps out with each heartbeat. It is a central indicator used by cardiologists across the United Kingdom to evaluate heart function and detect conditions such as heart failure. An EF reading is typically obtained through an echocardiogram, a cardiac MRI, or a nuclear medicine scan.
This article is for informational purposes only and should not be considered medical advice. Please consult a qualified healthcare professional for personalised guidance and treatment.
Normal Ejection Fraction Ranges
A healthy heart does not pump out all the blood it contains with each beat. Instead, a normal ejection fraction typically falls between 55% and 70%. This range indicates that the heart is contracting effectively and delivering adequate blood to the body and vital organs. Readings between 50% and 54% are considered borderline but may still be acceptable depending on individual clinical context. A reading below 40% is generally associated with heart failure with reduced ejection fraction (HFrEF), while a reading above 75% may occasionally indicate hypertrophic cardiomyopathy or other structural abnormalities.
Normal Ranges by Age
Ejection fraction values can vary slightly across different life stages, and what is considered normal may be interpreted differently depending on a patient’s age. In younger adults and children, EF values tend to sit toward the higher end of the normal spectrum, sometimes reaching 65% to 70%. In middle-aged adults, values between 55% and 65% are commonly observed and considered healthy. In older adults, particularly those over 65, a mild decline may be observed due to natural changes in cardiac muscle stiffness and reduced elasticity of blood vessels. However, values should not drop below 50% simply as a result of ageing alone. Any significant deviation warrants medical evaluation.
What Do Abnormal Ejection Fraction Values Mean
An ejection fraction outside the normal range signals that the heart may not be functioning optimally. A low EF, particularly below 40%, suggests the heart muscle is weakened and may not be pumping enough blood to meet the body’s demands. This can lead to symptoms such as breathlessness, fatigue, swelling in the legs, and reduced exercise tolerance. Conversely, a preserved but abnormally high EF may indicate the heart is overly rigid and unable to fill properly between beats, a condition known as heart failure with preserved ejection fraction (HFpEF). Both conditions require clinical management and should not be self-diagnosed based on numbers alone.
How to Maintain or Improve Normal Ejection Fraction
For individuals with a reduced ejection fraction, lifestyle changes and medical treatment can in many cases lead to measurable improvements. Regular moderate-intensity aerobic exercise, such as walking or cycling, has been shown to support heart muscle function over time. A heart-healthy diet low in saturated fats, salt, and processed foods helps manage blood pressure and cholesterol, both of which influence cardiac performance. Avoiding smoking and limiting alcohol consumption are also consistently associated with better cardiac outcomes. In clinical settings, medications such as ACE inhibitors, beta-blockers, and diuretics are commonly prescribed to improve EF in patients with heart failure. For some patients, devices like implantable cardioverter defibrillators (ICDs) or cardiac resynchronisation therapy (CRT) may be recommended.
Regular follow-up with a GP or cardiologist is essential for anyone with a known abnormal EF reading. Monitoring changes over time allows healthcare professionals to adjust treatment plans and catch any deterioration early.
Ejection fraction is a powerful but context-dependent measurement. A single number does not tell the full story of a person’s heart health. Age, underlying conditions, medications, and the technique used to measure EF can all influence the result. When reviewed alongside other clinical indicators such as blood pressure, heart rhythm, and symptom history, ejection fraction becomes a valuable tool in understanding and managing cardiovascular health across all stages of life.
