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Learn more about services at Mayo Clinic. Jan 29, 2025 · Ejection fraction is a measurement of the percentage of blood leaving the heart each time it squeezes. When the heart squeezes, it's called a contraction. Ejection fraction is just one of many. May 20, 2015 · The prevalence of this syndrome, termed heart failure with preserved ejection fraction (HFpEF), continues to increase in the developed world, likely because of the increasing prevalence. Jan 21, 2025 · Ejection fraction. Ejection fraction is a measurement of the percentage of blood leaving your heart each time it squeezes. This measurement is taken during an echocardiogram. The result. Aug 15, 2023 · It is common to use left ventricular ejection fraction as a way to determine prognosis. We have found this is not always the best way to determine prognosis in patients with heart failure. There.