Heart failure: MedlinePlus Medical Encyclopedia
Heart failure is a condition in which the heart is no longer able to pump oxygen-rich blood to the rest of the body efficiently. This causes symptoms to occur throughout the body.
Heart failure is most often a long-term (chronic) condition, but it may come on suddenly. It can be caused by many different heart problems.
The condition may affect only the right side or only the left side of the heart. Both sides of the heart also can be involved.
Heart failure may be due to two different problems with the heart muscle:
Your heart muscle cannot contract very well. This is called systolic heart failure, or heart failure with a reduced ejection fraction (HFrEF).
Your heart muscle is stiff and does not fill up with blood easily even though pumping power is normal. This is called diastolic heart failure, or heart failure with a preserved ejection fraction (HFpEF).
As the heart's pumping becomes less effective, blood may back up in other areas of the body. Fluid may build up in the lungs, liver, gastrointestinal tract, and the arms and legs. This is called congestive heart failure or, more simply, just heart failure.
The most common causes of heart failure are:
(CAD), a narrowing or blockage of the arteries that supply blood and oxygen to the heart. This can weaken the heart muscle over time or suddenly.
that is not well controlled, leading to problems with stiffness of the heart muscle, or eventually leading to heart muscle weakening.
Other heart problems that may cause heart failure are:
(when coronary artery disease results in a sudden blockage of a heart artery)
Heart valves that are leaky or narrowed
Infection that weakens the heart muscle
Some types of abnormal heart rhythms (
)
Other diseases that can cause or contribute to heart failure:
Severe
Too much iron in the body (usually due to hereditary
)
Symptoms of heart failure often begin slowly. At first, they may only occur when you are very active. Over time, you may notice breathing problems and other symptoms even when you are resting. Symptoms may also appear suddenly after the heart is damaged from a heart attack or other problem.
Common symptoms are:
Cough
Fatigue, weakness, faintness
Loss of appetite
Need to urinate at night
Pulse that feels fast or irregular, or a sensation of feeling the heartbeat (
)
when you are active or after you lie down
Swollen (enlarged) liver or abdomen
Waking up from sleep after a couple of hours due to shortness of breath
Your health care provider will examine you for signs of heart failure:
Fast or difficult breathing
Leg swelling (
)
Neck veins that stick out (are distended)
Sounds (crackles) from fluid buildup in your lungs, heard through a stethoscope
Swelling of the liver or abdomen
Uneven or fast heartbeat and abnormal heart sounds
Many
tests are used to diagnose and monitor heart failure
.
After an electrocardiogram (ECG), an
(echo) is most often the best first test for people when heart failure is being evaluated. Your provider will use it to guide your treatment.
Other imaging tests can look at how well your heart is able to pump blood, and how much the heart muscle is damaged.
Many blood tests may also be used to:
Help diagnose and monitor heart failure
Identify risks for various types of heart disease
Look for possible causes of heart failure, or problems that may make your heart failure worse
Monitor for side effects of medicines you may be taking
MONITORING AND SELF CARE
If you have heart failure, your provider will monitor you closely. You will have follow-up visits at least every 3 to 6 months, but sometimes much more often. You will also have tests to check your heart function.
Knowing your body and the
symptoms that mean your heart failure is getting worse
will help you stay healthier and out of the hospital. At home, watch for changes in your heart rate, pulse, blood pressure, and weight.
Weight gain and leg swelling, especially over a few day, can be a sign that your body is holding on to extra fluid and your heart failure is getting worse. Talk to your provider about what you should do if your weight goes up or you develop more symptoms.
Limit how much salt you eat. Your provider may also ask you to limit how much fluid you drink during the day.
Other important changes to make in your
:
Ask your provider how much alcohol you may drink.
or use tobacco.
Stay active. Walk or ride a stationary bicycle. Your provider can provide a safe and effective exercise plan for you. DO NOT exercise on days when your weight has gone up from fluid or you are not feeling well.
Lose weight if you are overweight.
Lower your cholesterol by
.
Get enough rest, including after exercise, eating, or other activities. This allows your heart to rest too.
MEDICINES, SURGERY, AND DEVICES
You will need to take medicines to treat your heart failure. Medicines treat the symptoms, prevent your heart failure from getting worse, and help you live longer. It is very important that you take your medicine as your health care team directs.
These medicines may:
Help the heart muscle pump better
Keep your blood from clotting
Lower your
Open up blood vessels or slow your heart rate so your heart does not have to work as hard
Reduce damage to your heart
Reduce the risk for abnormal heart rhythms
Replace potassium in your body
Rid your body of excess fluid and salt (sodium)
It is very important that you take your medicine as directed. DO NOT take any other medicines or herbs without first asking your provider about them. Medicines that may make your heart failure worse include:
Ibuprofen (Advil, Motrin)
Naproxen (Aleve, Naprosyn)
The following
may be recommended for some people with heart failure:
Coronary bypass surgery (CABG)
or
with or without stenting may help improve blood flow to the damaged or weakened heart muscle.
may be done if changes in a heart valve are causing your heart failure.
A
can help treat slow heart rates or help both sides of your heart contract at the same time.
A
sends an electrical pulse to stop life-threatening abnormal heart rhythms.
END-STAGE HEART FAILURE
Severe heart failure occurs when treatments no longer work. Certain treatments may be used when a person is waiting for (or instead of) a heart transplant:
Intra-aortic balloon pump (IABP)
Left or right ventricular assist device
(LVAD)
Total artificial heart
At a certain point, the provider will decide whether it is best to keep treating heart failure aggressively. The person, along with their family and providers, may want to discuss
at this time.
Often, you can control heart failure by taking medicine, changing your lifestyle, and treating the condition that caused it.
Heart failure can suddenly get worse due to:
Ischemia (lack of blood flow to the heart muscle)
Heart attack
Infections or other illnesses
Not taking medicines correctly
New, abnormal heart rhythms
Most of the time, heart failure is a chronic illness. Some people develop severe heart failure that no longer responds to medicines, other treatments, and surgery.
People with heart failure may be at risk for dangerous heart rhythms. These people often receive an implanted defibrillator.
Contact your provider if you develop:
Increased cough or phlegm
Sudden weight gain or swelling
Weakness
Other new or unexplained symptoms
Go to the emergency room or call the local emergency number (such as 911) if:
You faint
You have fast and
(especially if you also have other symptoms)
You feel a severe
CHF; Congestive heart failure; Left-sided heart failure; Right-sided heart failure - cor pulmonale; Cardiomyopathy - heart failure; HF
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.
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Updated by: Michael A. Chen, MD, PhD, Associate Professor of Medicine, Division of Cardiology, Harborview Medical Center, University of Washington Medical School, Seattle, WA. Internal review and update on 07/01/2025 by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.