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Because the left ventricle is the heart's main pumping chamber, ejection fraction is usually measured only in the left ventricle (LV). A normal LV ejection fraction is 55 to 70 percent. The ejection fraction may decrease if your heart has been damaged by a heart attack or other problems with the heart valves or muscle.
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The progression from concentric left ventricular (LV) hypertrophy to heart failure has not been well defined. ... Of 159 predominantly hypertensive African-American patients with LV hypertrophy and a normal ejection fraction (EF), 28 (18%) developed a reduced EF after a median follow-up of approximately 4 years.
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An EF of 55 to 75 percent is considered normal. A higher than normal ejection fraction could indicate the presence of certain heart conditions, such as hypertrophic cardiomyopathy. A low ejection fraction could be a sign that the heart is weakened.
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Ejection fraction - Wikipedia, the free encyclopedia
In cardiovascular physiology, ejection fraction ( E f ) is the fraction of blood pumped out of a ventricle with each heart beat. The term ejection fraction applies to both the right and left ...
en.wikipedia.org/wiki/Ejection_fraction |
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Normal ejection fraction is between 55-75. A measurement under 40 may be evidence of heart failure or cardiomyopathy. An EF between 40 and 55 indicates damage, perhaps from a previous heart attack, but it may not indicate heart failure.
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