Heart Failure
Also known as: Congestive Heart Failure, CHF
Quick Facts
Overview
Heart failure is a chronic, progressive condition in which the heart muscle is unable to pump blood efficiently enough to meet the body's needs. Despite its name, heart failure does not mean the heart has stopped working — rather, it means the heart is weaker than normal and struggles to keep up with the demands of the body. Blood may back up in the lungs or other tissues, causing the hallmark symptoms of shortness of breath and fluid retention.
Heart failure can affect the left side, the right side, or both sides of the heart. Left-sided heart failure — the most common type — causes fluid to build up in the lungs. Right-sided heart failure leads to fluid accumulation in the legs, ankles, and abdomen. Heart failure is classified by ejection fraction: HFrEF (reduced ejection fraction, where the heart doesn't contract well) and HFpEF (preserved ejection fraction, where the heart doesn't relax and fill properly).
Approximately 6.2 million adults in the United States live with heart failure, and about 960,000 new cases are diagnosed each year. While heart failure is a serious condition, advances in medication, devices, and lifestyle management have significantly improved outcomes. Many people with heart failure live active, meaningful lives for years after diagnosis.
Symptoms
Recognizing the symptoms of heart failure early can lead to faster diagnosis and better outcomes.
Early Symptoms
- Shortness of breath during physical activity
- Fatigue and weakness with routine tasks
- Mild swelling in the ankles or feet by the end of the day
- Need to use extra pillows to sleep comfortably
Advanced Symptoms
- Shortness of breath even at rest or while lying flat
- Persistent cough or wheezing with white or pink-tinged mucus
- Significant swelling in the legs, ankles, feet, or abdomen
- Rapid or irregular heartbeat
- Sudden weight gain from fluid retention (2-3 pounds in a day)
- Difficulty concentrating or decreased alertness
- Reduced appetite and nausea
Emergency Warning Signs
- Sudden, severe shortness of breath with frothy or pink mucus
- Chest pain that may indicate a heart attack
- Fainting or severe lightheadedness
- Rapid heart rate with extreme shortness of breath
- Bluish discoloration of the skin (cyanosis)
When to See a Doctor
Contact your doctor if you notice increased shortness of breath, new or worsening swelling, sudden weight gain (more than 2-3 pounds in a day), or a persistent cough. Seek emergency care if you experience sudden severe breathing difficulty, chest pain, fainting, or bluish skin color.
Causes & Risk Factors
Common Causes
- Coronary artery disease — the most common cause, reduces blood flow to the heart muscle
- Prior heart attack that damaged heart tissue
- Chronic high blood pressure forcing the heart to work harder
- Damaged or diseased heart valves
- Cardiomyopathy — disease of the heart muscle from infections, alcohol abuse, or genetics
- Congenital heart defects
- Heart arrhythmias, especially long-standing atrial fibrillation
Risk Factors
- Coronary artery disease or previous heart attack
- High blood pressure
- Diabetes, especially type 2
- Obesity
- Age over 65
- Atrial fibrillation or other arrhythmias
- Sleep apnea
- Excessive alcohol consumption
- Smoking
- Family history of heart failure
How It's Diagnosed
Diagnosing heart failure involves a combination of physical examination, medical history, and diagnostic tests. During the physical exam, your doctor will listen to your heart and lungs (checking for fluid sounds), examine your legs and abdomen for swelling, and check your neck veins for distension. Blood tests, particularly for a protein called B-type natriuretic peptide (BNP or NT-proBNP), can help confirm heart failure — elevated levels indicate the heart is under stress.
The most important imaging test is an echocardiogram, which uses ultrasound to show how well your heart is pumping and whether there are structural problems with the valves or chambers. Your doctor may also order a chest X-ray (to check for lung congestion and heart enlargement), an electrocardiogram (ECG), stress tests, cardiac MRI, or cardiac catheterization. Together, these tests help determine the type and severity of heart failure and guide treatment decisions.
Treatment Options
Lifestyle Changes
- Limit sodium intake to 1,500-2,000 mg per day to reduce fluid retention
- Monitor daily weight and report sudden gains to your doctor
- Restrict fluid intake as recommended (typically 6-8 cups per day in advanced cases)
- Engage in regular, gentle exercise as approved by your doctor (cardiac rehab is ideal)
- Quit smoking and limit alcohol
- Get adequate sleep and treat sleep apnea if present
Medications
- ACE inhibitors or ARBs — reduce strain on the heart and improve survival
- Beta-blockers (carvedilol, metoprolol) — slow heart rate and improve function over time
- Diuretics (furosemide) — remove excess fluid and relieve swelling
- Aldosterone antagonists (spironolactone) — reduce fluid retention and improve outcomes
- SGLT2 inhibitors (dapagliflozin, empagliflozin) — newer drugs shown to reduce hospitalization
- Sacubitril/valsartan (Entresto) — combination drug that reduces strain and improves survival
Medical Procedures
- Implantable cardioverter-defibrillator (ICD) — prevents sudden cardiac death
- Cardiac resynchronization therapy (CRT) — pacemaker-like device improves heart coordination
- Left ventricular assist device (LVAD) — mechanical pump for advanced heart failure
- Heart transplant — for end-stage heart failure when other treatments are no longer effective
- Valve repair or replacement surgery
Complementary Approaches
- Coenzyme Q10 supplementation (some evidence of modest benefit)
- Hawthorn extract (limited evidence, consult your doctor before using)
- Mindfulness-based stress reduction programs
Living With Heart Failure
Living with heart failure requires daily self-management and close communication with your healthcare team. Weighing yourself every morning and recording the result helps catch fluid buildup before it becomes a problem — a gain of 2-3 pounds in a day or 5 pounds in a week is a signal to call your doctor. Managing your sodium intake is one of the most effective things you can do; learning to read food labels and cooking at home makes this much easier.
Many people with heart failure find that a structured cardiac rehabilitation program provides the guidance, exercise support, and education they need to feel confident managing their condition. Fatigue is one of the most challenging symptoms, but staying as active as possible within your limits actually improves energy levels over time. Emotional support matters too — anxiety and depression are common in heart failure, and talking to a counselor or joining a support group can make a real difference in your quality of life.
Potential Complications
- Kidney damage or failure from reduced blood flow
- Liver damage from fluid congestion
- Heart valve problems from an enlarged heart
- Dangerous heart arrhythmias including sudden cardiac arrest
- Pulmonary hypertension
- Severe weight loss and muscle wasting (cardiac cachexia) in advanced stages
Prevention
- Control high blood pressure with medication and lifestyle changes
- Manage diabetes effectively
- Maintain a healthy weight
- Exercise regularly
- Don't smoke and limit alcohol consumption
- Treat coronary artery disease and other heart conditions early
- Get regular checkups and cardiac screenings as recommended
Frequently Asked Questions
Sources
- Heart Failure. American Heart Association. View source
- Heart Failure — Symptoms and Causes. Mayo Clinic. View source
- Heart Failure. National Heart, Lung, and Blood Institute. View source
- Heart Failure Facts. Centers for Disease Control and Prevention. View source
- 2022 AHA/ACC/HFSA Guideline for the Management of Heart Failure. American Heart Association / American College of Cardiology. View source
Medical Disclaimer
This content is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.
Medically Reviewed By
Dr. James Carter, MD, Cardiology, Board Certified
Last reviewed: March 18, 2025
Our medical review process ensures accuracy and clinical relevance.
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