Middle English (Scots) carne, from Scottish Gaelic carn; akin to Old Irish & Welsh carn cairn
Ejection fraction is commonly measured by an echocardiogram and serves as a general measure of a person's cardiac function. Ejection fraction is typically low in patients with the systolic form of congestive heart failure.
Many different heart and vascular diseases can lead to low ejection fraction, including: 1  Cardiomyopathy: This condition causes areas of heart tissue to thicken. Learn more about cardiomyopathy. 2  Coronary artery disease: This heart disease narrows or blocks the two main arteries that supply blood to your heart muscle.