Ejection fraction (EF) is a measurement of how much oxygen-rich blood your heart pumps out each time it contracts (squeezes). It's expressed as a percentage and typically refers to the left ventricle, which is the heart's main pumping chamber.
Here's a quick breakdown of what the numbers mean:
- Normal (50%–70%): The Show Full Answer
Ejection fraction (EF) is a measurement of how much oxygen-rich blood your heart pumps out each time it contracts (squeezes). It's expressed as a percentage and typically refers to the left ventricle, which is the heart's main pumping chamber.
Here's a quick breakdown of what the numbers mean:
- Normal (50%–70%): The heart is pumping well. It's still possible to have heart failure even with a normal EF.
- Low (below 40%): The heart's pumping action is weaker than it should be. This is known as heart failure with reduced ejection fraction (HFrEF).
- Borderline/Midrange (41%–49%): May indicate some damage, such as from a previous heart attack.
- High (above 75%): Can signal a heart condition where the heart walls are thicker than normal. EF is just a measurement — it has no symptoms on its own. Your doctor may use tests like an echocardiogram, MRI, or cardiac catheterization to measure it.
It's always best to discuss your specific EF number with your doctor, as what's "ideal" can vary based on your individual situation.
July 3
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