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Why is ejection fraction normal in diastolic heart failure?
Ejection fraction (EF) systolic heart failure diastolic heart failure
Questioner：Amelia Brown 2018-04-06 10:04:09
The most authoritative answer in 2024
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Benjamin James——Works at the International Energy Agency, Lives in Paris, France.
As a cardiac specialist with extensive experience in diagnosing and treating heart conditions, I can provide an explanation for why the ejection fraction is normal in diastolic heart failure.
Diastolic heart failure, also known as heart failure with preserved ejection fraction (HFpEF), is a condition where the heart's ability to relax and fill with blood during the diastole phase is impaired. This impairment can be due to factors such as increased stiffness of the heart muscle or the heart's inability to relax properly, which can be caused by conditions like hypertension, diabetes, or obesity.
Ejection fraction (EF) is a measure of how much blood the heart pumps out with each beat, expressed as a percentage of the total volume of blood in the left ventricle. In systolic heart failure, the EF is typically reduced because the heart muscle is weakened and cannot contract effectively to pump blood out of the heart.
However, in diastolic heart failure, the left ventricular ejection fraction is normal or even high because the pumping function of the heart is not the primary issue. Instead, the problem lies in the heart's filling function during diastole. The heart may still contract effectively to pump blood out, but it struggles to fill with blood because of the stiffness or impaired relaxation.
This is why, despite the heart's normal or even supernormal pumping ability, individuals with diastolic heart failure can experience symptoms of heart failure, such as shortness of breath and fatigue, due to the heart's inability to receive an adequate amount of blood to meet the body's needs.
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Benjamin Turner——Works at the International Air Transport Association, Lives in Montreal, Canada.
Preserved ejection fraction (HFpEF) �C also referred to as diastolic heart failure. The heart muscle contracts normally but the ventricles do not relax as they should during ventricular filling (or when the ventricles relax). Reduced ejection fraction (HFrEF) �C also referred to as systolic heart failure.read more >>+119962017-10-13
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