Congestive Heart Failure: Causes, Symptoms, and Treatment
Medically reviewed by Achuta Uppu, MD, Internal Medicine. Last reviewed: October 23, 2026.
What kind of doctor treats Congestive Heart Failure?
A cardiologist (a doctor who specializes in heart diseases) usually treats congestive heart failure. Your provider may refer you to a cardiologist for tests, diagnosis, and care. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What is congestive heart failure?
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. It does not mean that your heart has stopped or is about to stop beating. 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. It is most often a long-term (chronic) condition, but it may come on suddenly.
Symptoms
Symptoms of heart failure often begin slowly. Over time, you may notice breathing problems and other symptoms even when you are resting.
Common symptoms are:
- Cough.
- Fatigue, weakness, faintness.
- Swollen feet and ankles.
- A pulse that feels fast or irregular, or a sensation of feeling the heartbeat (palpitations).
- Shortness of breath when you are active or after you lie down.
- Waking up from sleep after a couple of hours due to shortness of breath.
Weight gain and leg swelling over a few days can be a sign that your body is holding on to extra fluid and your heart failure is getting worse.
Causes and who gets it
In most cases, heart failure develops slowly from long-term medical conditions. Coronary artery disease is one of the most common causes of heart failure. It is a narrowing or blockage of the arteries that supply blood and oxygen to the heart. High blood pressure that is not well controlled is another common cause. Other conditions that can cause heart failure include heart attack, heart valve diseases, a blood clot in your lung, and diabetes. It happens to both men and women, but men often develop it at a younger age than women. Your chance of heart failure goes up if you are 65 or older, because aging can weaken and stiffen your heart muscle.
How doctors diagnose it
Your provider will ask about your medical history, including your symptoms. Your provider will look for signs such as fast or difficult breathing, leg swelling (edema), and neck veins that stick out. Your provider will likely run heart tests and blood tests, including a brain natriuretic peptide (BNP) test. BNP levels rise during heart failure. After an electrocardiogram (ECG), an echocardiogram (echo) is most often the best first test when heart failure is being evaluated. An echo can measure your ejection fraction, which is the percent of the blood in the lower left chamber of your heart that is pumped out with each heartbeat.
Treatment
Medicines treat the symptoms, prevent your heart failure from getting worse, and help you live longer. Often, you can control heart failure by taking medicine, changing your lifestyle, and treating the condition that caused it.
Heart failure medicines may:
- Help the heart muscle pump better.
- Open up blood vessels or slow your heart rate so your heart does not have to work as hard.
- Rid your body of excess fluid and salt (sodium).
Do not take any other medicines or herbs without first asking your provider about them. Ibuprofen (Advil, Motrin) and naproxen (Aleve, Naprosyn) may make your heart failure worse. Limit how much salt you eat. Do not smoke or use tobacco. Do not exercise on days when your weight has gone up from fluid or you are not feeling well. A pacemaker can help treat slow heart rates or help both sides of your heart contract at the same time. A defibrillator sends an electrical pulse to stop life-threatening abnormal heart rhythms.
When to see a doctor
Contact your provider if you have increased cough or phlegm, sudden weight gain or swelling, weakness, or other new or unexplained symptoms. Call 911 or go to the emergency room if you faint, have serious trouble breathing, have severe chest pain, or have a fast and irregular heartbeat along with other symptoms.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. Such a doctor can be the provider who monitors you closely if you have heart failure.
Common questions
Is congestive heart failure the same as heart failure?
Yes, congestive heart failure is usually just called heart failure.
Does heart failure mean the heart has stopped?
No, heart failure does not mean that your heart has stopped or is about to stop beating.
Can heart failure be prevented?
Yes, most cases of heart failure can be prevented by living a healthy lifestyle and taking steps aimed at reducing your risk for heart disease.
What can make heart failure suddenly worse?
Several things can make heart failure suddenly worse, such as eating high-salt foods, a heart attack, infections or other illnesses, or not taking medicines correctly.
Sources
- MedlinePlus - Heart failure
- MedlinePlus - Heart Failure
- National Heart, Lung, and Blood Institute - Heart Failure Diagnosis
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
