Ejection fraction is a measurement used in cardiology to assess the percentage of blood pumped out of the left ventricle of the heart with each contraction. This measurement is important in diagnosing and monitoring various heart conditions, such as heart failure or cardiomyopathy. A normal ejection fraction is typically between 50-70%. A low ejection fraction may indicate a reduced ability of the heart to pump blood effectively, while a high ejection fraction may indicate a hyperdynamic state of the heart. Ejection fraction is often calculated using imaging techniques such as echocardiography or cardiac MRI.