Heart Failure With Preserved vs Reduced Ejection Fraction: What Is the Difference?

Heart failure with preserved ejection fraction and reduced ejection fraction are two main types of heart failure. Both affect how well the heart supports the body, but they differ in whether the main problem is filling, pumping, or both.

Overview

Heart failure is a long-term condition in which the heart cannot meet the body’s needs as effectively as it should. This does not mean the heart has stopped working. Instead, it means the heart is not pumping blood well enough, not filling well enough, or both. As a result, fluid can build up in the lungs or legs, and daily activities may become more tiring.

Doctors often divide heart failure into two major categories based on ejection fraction, a measurement that shows how much blood the left ventricle pumps out with each heartbeat. In heart failure with reduced ejection fraction, or HFrEF, the heart’s pumping action is weaker than normal. In heart failure with preserved ejection fraction, or HFpEF, the pumping percentage may appear normal, but the heart muscle is often stiff and does not relax properly between beats.

This distinction is important because the causes, common patient profiles, and treatment strategies can differ. Even so, both types are real forms of heart failure and can significantly affect quality of life. The symptoms may be very similar, which is why medical evaluation is needed rather than relying on symptoms alone.

How ejection fraction relates to heart failure

Ejection fraction, often shortened to EF, is usually measured with an echocardiogram, which is an ultrasound scan of the heart. It estimates the percentage of blood pushed out of the left ventricle each time it contracts. A lower ejection fraction suggests weaker pumping strength, while a preserved ejection fraction suggests that the percentage pumped out remains within or near the expected range.

In HFrEF, the heart muscle is often enlarged or weakened, so it cannot squeeze effectively. This means less blood is sent forward to the body. In HFpEF, the heart may squeeze normally, but the ventricle is stiffer and fills with less blood in the first place. Even though the percentage pumped out is preserved, the total amount of blood delivered can still be inadequate.

Some people may also hear about heart failure with mildly reduced ejection fraction, which falls between preserved and reduced ranges. This reflects the fact that heart failure exists on a spectrum. A doctor considers EF together with symptoms, imaging findings, blood tests, blood pressure, heart rhythm, and other health conditions before deciding on the diagnosis and treatment plan.

Symptoms and daily impact

HFpEF and HFrEF can cause many of the same symptoms. Common complaints include shortness of breath during activity or when lying flat, fatigue, reduced stamina, swelling in the ankles or legs, and sudden weight gain from fluid retention. Some people also notice coughing, a feeling of chest tightness, waking at night short of breath, or needing more pillows to sleep comfortably.

These symptoms may develop gradually or become more noticeable after an infection, uncontrolled blood pressure, a heart rhythm problem, or missed medication. In older adults especially, heart failure may first appear as reduced exercise tolerance, confusion, poor sleep, or difficulty carrying out normal daily tasks rather than dramatic chest symptoms.

Not everyone experiences symptoms the same way. HFpEF is common in older adults and may be associated with exertional breathlessness and fatigue despite a seemingly “normal” ejection fraction. HFrEF may be more likely after a prior heart attack or heart muscle disease. In both cases, symptoms deserve proper assessment because similar complaints can also occur with lung disease, anemia, kidney problems, or deconditioning.

• Shortness of breath with activity or at rest
• Swelling in the feet, ankles, legs, or abdomen
• Fatigue and weakness
• Rapid weight gain from fluid buildup
• Palpitations or irregular heartbeat
• Reduced ability to exercise

Causes and risk factors

The causes of HFrEF and HFpEF often overlap, but there are patterns that are more common with each type. HFrEF frequently develops after direct damage to the heart muscle. This can happen after a heart attack, long-standing coronary artery disease, inflammation of the heart muscle, certain inherited cardiomyopathies, or some toxin-related injuries. Conditions that gradually weaken the heart can also lead to reduced ejection fraction over time.

HFpEF is more often linked to a stiff, less compliant heart muscle and to conditions that make the heart work harder over many years. Common contributors include high blood pressure, aging, obesity, diabetes, chronic kidney disease, sleep apnea, and atrial fibrillation. Many patients with HFpEF have several of these conditions at the same time, and controlling them is a key part of care.

Other factors can contribute to either form of heart failure. These include valve disease, thyroid disorders, severe anemia, chronic lung disease, and persistent high alcohol intake. Because the causes vary, doctors may investigate for related problems such as coronary artery disease or heart rhythm disorders when symptoms suggest them.

How doctors diagnose HFpEF and HFrEF

Diagnosis starts with a careful discussion of symptoms, medical history, medications, and risk factors. A physical examination may show fluid retention, abnormal heart sounds, lung crackles, a fast or irregular heartbeat, or signs of high blood pressure. Because symptoms can overlap with many other illnesses, testing is usually needed to confirm heart failure and identify its type.

An echocardiogram is one of the most important tests because it helps measure ejection fraction and shows how the heart chambers, valves, and muscle are functioning. Blood tests may include natriuretic peptides, kidney function, liver function, thyroid tests, blood sugar, and blood counts. An electrocardiogram can detect prior heart injury or rhythm abnormalities, while a chest X-ray may show fluid in the lungs or an enlarged heart.

Some patients need more detailed evaluation, especially if the cause is unclear or symptoms are severe. Depending on the situation, doctors may recommend stress testing, coronary imaging, cardiac MRI, or cardiac catheterization to better understand blood flow, pressures, or structural problems. Identifying the correct type of heart failure matters because it guides treatment decisions and helps set realistic expectations for recovery and long-term control.

Treatment options and long-term management

Treatment aims to relieve symptoms, reduce fluid overload, improve daily functioning, and manage the conditions that caused or worsened the heart failure. Diuretic medicines are commonly used in both HFpEF and HFrEF to help the body remove excess fluid and ease swelling or breathlessness. Blood pressure control, treatment of diabetes, kidney care, and rhythm management are also central parts of treatment.

For HFrEF, several medication groups have been shown to improve outcomes in many patients, depending on individual circumstances. These may include medicines that reduce strain on the heart, support more effective pumping, and lower the risk of hospitalization. Some people may also benefit from devices such as pacemakers designed for heart resynchronization or implantable defibrillators if the heart rhythm risk is high.

For HFpEF, treatment often focuses strongly on managing contributing conditions such as hypertension, obesity, sleep apnea, atrial fibrillation, and diabetes, while also relieving congestion and improving exercise tolerance. In selected cases, doctors may evaluate for procedures related to blocked arteries or valve disease, including coronary angioplasty and stent placement or heart valve surgery. Near the end of the care pathway, patients seeking international evaluation may also consider centers such as Acibadem International, where multidisciplinary specialists in JCI-accredited hospitals diagnose and treat heart failure and related conditions.

Prevention, self-care, and when to seek medical help

Many heart failure complications can be reduced with consistent self-care. Patients are often advised to take medicines exactly as prescribed, attend follow-up visits, and monitor symptoms over time. Practical steps may include limiting excess salt, staying physically active as tolerated, maintaining a healthy weight, avoiding smoking, limiting alcohol, and discussing any new over-the-counter medicines with a doctor because some can worsen fluid retention or blood pressure control.

Daily weight tracking can be useful because rapid increases may suggest fluid buildup before symptoms become severe. Keeping blood pressure, diabetes, kidney disease, and sleep apnea under control is especially important in HFpEF. Vaccinations, especially against flu and other respiratory infections as advised by a doctor, may also help reduce stress on the heart.

Medical review is important for new or worsening shortness of breath, swelling, dizziness, fainting, a fast irregular heartbeat, or difficulty carrying out normal activities. Urgent care is needed for severe breathlessness, chest pain, blue lips, confusion, or sudden collapse. Early assessment can help prevent hospital admission and allows doctors to adjust treatment before symptoms become harder to control.

Frequently asked questions

Is HFpEF less serious than HFrEF?

Not necessarily. HFpEF and HFrEF are both important forms of heart failure and both can affect quality of life and lead to complications. The outlook depends on many factors, including age, other medical conditions, symptom severity, and how well treatment is followed.

Can a person have heart failure with a normal ejection fraction?

Yes. This is the main feature of heart failure with preserved ejection fraction. In this situation, the heart may pump out a normal percentage of blood, but the ventricle may be stiff and fill poorly, so the body still does not get enough effective circulation.

What test is most commonly used to tell the difference between HFpEF and HFrEF?

An echocardiogram is commonly the key test. It helps measure ejection fraction and provides information about heart size, wall motion, valve function, and signs of abnormal filling.

Can ejection fraction improve over time?

In some people, yes. If the cause is treatable and the patient responds well to medication, lifestyle changes, or procedures, ejection fraction may improve. Even when EF does not fully normalize, symptoms and daily function can still get better with careful management.

Are the symptoms of HFpEF and HFrEF different?

They often overlap a great deal. Both types can cause breathlessness, fatigue, swelling, and reduced exercise tolerance, which is why testing is needed to identify the type accurately. A doctor looks at imaging, blood tests, and associated conditions rather than symptoms alone.

Can lifestyle changes really help heart failure?

Yes, lifestyle habits are an important part of treatment alongside medical care. Taking medicines regularly, reducing excess salt, staying active within safe limits, managing weight, and controlling blood pressure or diabetes can all support better symptom control.

References

• American Heart Association
• European Society of Cardiology
• National Heart, Lung, and Blood Institute
• Heart Failure Society of America
• Centers for Disease Control and Prevention

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.