Congestive Heart Failure: Symptoms, Stages, and How It's Treated
Updated: 3 days ago
Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: November 2026
Quick Answer
Congestive heart failure is a lifelong condition in which the heart cannot pump enough blood for the body's needs, so fluid builds up in the lungs, legs and feet [1]. Symptoms include shortness of breath, swelling, weight gain and fatigue [1]. There is no cure, but medications, a low-sodium diet, exercise and advanced therapies can slow progression [1].
What the research says
SGLT2 inhibitors lowered the risk of heart-failure death and hospital stays across a wide range of patients. A meta-analysis of 5 randomized trials with 21,947 participants found that SGLT2 inhibitors reduced the composite of cardiovascular death or hospitalization for heart failure (hazard ratio 0.77, 95% CI 0.72 to 0.82), cardiovascular death (0.87, 0.79 to 0.95), first hospitalization for heart failure (0.72, 0.67 to 0.78), and all-cause mortality (0.92, 0.86 to 0.99). The effects were consistent regardless of ejection fraction (PubMed: Vaduganathan et al., Lancet, 2022) [2].
Exercise-based cardiac rehabilitation reduced hospital admissions and improved quality of life. A Cochrane-based meta-analysis of 60 trials (8,728 participants) found that, over the short term (12 months or less), exercise-based rehabilitation did not change all-cause mortality (relative risk 0.93, 95% CI 0.71 to 1.21) but reduced all-cause hospitalization (relative risk 0.69, 95% CI 0.56 to 0.86; number needed to treat 13) and improved quality of life on the Minnesota Living with Heart Failure questionnaire (mean difference -7.39 points, 95% CI -10.30 to -4.47). Benefits were seen in centre-based, home-based, and hybrid programs (PubMed: Molloy et al., Eur J Heart Fail, 2023) [3].
Cutting dietary sodium to under 1,500 mg a day did not reduce clinical events in one large trial. In the open-label SODIUM-HF trial, 806 patients with chronic heart failure were randomized to a low-sodium diet (under 1,500 mg/day) or usual care. By 12 months, the primary composite of cardiovascular hospital admission, cardiovascular emergency department visit, or death had occurred in 60 of 397 patients (15%) in the low-sodium group and 70 of 409 (17%) in the usual-care group (hazard ratio 0.89, 95% CI 0.63 to 1.26; p=0.53). Ask your provider how much salt is right for you (PubMed: Ezekowitz et al., Lancet, 2022) [4].
What Is Congestive Heart Failure?
Congestive heart failure, often simply called heart failure, is a long-term condition in which the heart can't pump blood well enough to meet the body's needs. The heart is still working. But because it can't handle the amount of blood it should, blood builds up in other parts of the body. Most of the time, it collects in the lungs, legs, and feet [1].
One helpful way to picture it is a shipping department that can't keep up. It is always running behind, shipments pile up, and the pileup causes problems. In heart failure, the "pileup" is fluid in the body.
Key Fact | Detail |
Definition | Heart can't pump blood well enough to meet the body's needs |
Heart status | The heart is still working |
Fluid buildup | Mostly lungs, legs, and feet |
U.S. prevalence | More than 6 million people |
Older adults | Leading cause of hospitalization after age 65 |
Duration | Chronic, lifelong condition |
Types of Congestive Heart Failure
There are three main types of congestive heart failure.
Type | Notes |
Left-sided heart failure | The most common form |
Right-sided heart failure | Most often caused by left-sided failure |
High-output heart failure | A rare type |
Left-sided heart failure is the most common cause of right-sided heart failure. When the left ventricle isn't working correctly, blood is allowed to back up. Over time, this backup affects the right ventricle. Other causes of right-sided failure include certain lung problems and issues in other organs.
How Common Is Congestive Heart Failure?
More than 6 million people in the United States have congestive heart failure. It is the leading cause of hospitalization in people older than 65.
What are the symptoms of congestive heart failure?
Congestive heart failure symptoms can range from mild to severe and may come and go [1]. Sometimes symptoms are mild or absent entirely — this does not mean the heart failure is gone.
Symptom | What It Looks Like |
Shortness of breath | Including waking up short of breath at night |
Chest pain | Discomfort in the chest |
Heart palpitations | Awareness of a fast or irregular heartbeat |
Fatigue | Feeling tired when active |
Swelling | In the ankles, legs, and abdomen |
Weight gain | Often from fluid retention |
Nighttime urination | Need to urinate while resting at night |
Cough | A dry, hacking cough |
Stomach changes | A full (bloated) or hard stomach |
Appetite changes | Loss of appetite or upset stomach (nausea) |
Unfortunately, congestive heart failure usually gets worse over time [1]. As it worsens, more or different signs and symptoms may appear.
What Causes Congestive Heart Failure?
Congestive heart failure can be caused by several health conditions and habits, and some risk factors raise the chance of developing it [1].
Cause | Category |
Coronary artery disease and/or heart attack | Heart disease |
Cardiomyopathy (genetic or viral) | Heart muscle disease |
Heart issues present at birth | Congenital heart disease |
Diabetes | Metabolic |
High blood pressure (hypertension) | Vascular |
Arrhythmia | Rhythm disorder |
Kidney disease | Organ disease |
BMI higher than 30 | Weight |
Tobacco and recreational drug use | Substance |
Alcohol use | Substance |
Certain medications, such as cancer drugs (chemotherapy) | Medication |
Risk Factors
Some factors raise the chance of developing congestive heart failure [1].
Risk Factor | Detail |
Age | Being older than 65 |
Substances | Tobacco products, cocaine, or alcohol |
Lifestyle | Inactive (sedentary) lifestyle; foods high in salt and fat |
Existing conditions | High blood pressure, coronary artery disease, or a past heart attack |
Genetics | Family history of congestive heart failure |
What are the complications of congestive heart failure?
As heart failure progresses, it can damage other organs and systems [1].
Complication | Description |
Irregular heartbeat | Abnormal heart rhythm |
Sudden cardiac arrest | Sudden loss of heart function |
Heart valve problems | Valve disease develops |
Fluid in the lungs | A collection of fluid in the lungs |
Pulmonary hypertension | High blood pressure in the lungs |
Kidney damage | Ongoing harm to the kidneys |
Liver damage | Ongoing harm to the liver |
Malnutrition | Poor nutrition from appetite and digestion changes |
How is congestive heart failure diagnosed?
Congestive heart failure is diagnosed with a medical history, a physical exam and common tests that identify the condition, its stage and its cause.
History and Physical Exam
The provider starts by asking about symptoms and medical history, including other health conditions, a family history of heart disease or sudden death, tobacco use, alcohol intake, any history of chemotherapy or radiation, and the medications being taken [1].
A physical exam follows. The provider looks for signs of congestive heart failure and for diseases that may have made the heart muscle weak or stiff.
The Four Stages of Heart Failure
Heart failure is a chronic condition that worsens over time. There are four stages (A, B, C, and D), ranging from high risk of developing heart failure to advanced heart failure [1]. Because the condition is chronic, you cannot move backward through the stages.
Stage | What It Means |
Stage A (pre-heart failure) | High risk due to family history or conditions such as hypertension, diabetes, coronary artery disease, metabolic syndrome, alcohol use disorder history, rheumatic fever history, family history of cardiomyopathy, or past use of drugs that can damage the heart muscle (some cancer drugs) |
Stage B (pre-heart failure) | Left ventricle isn't working well and/or is structurally abnormal, but no heart failure symptoms have occurred |
Stage C | Has a heart failure diagnosis; currently has or previously had symptoms |
Stage D (advanced) | Advanced symptoms that don't improve with treatment (Stage D HFrEF); the final stage |
Tests Used
Common tests identify congestive heart failure, its stage, and its cause [1].
Test | Purpose |
Blood tests | Look for heart stress markers and organ function |
Cardiac catheterization | Examines heart arteries and function |
Chest X-ray | Shows heart size and fluid in the lungs |
Echocardiogram | Evaluates how the heart pumps |
Heart MRI | Detailed pictures of the heart |
Cardiac CT | Detailed imaging of the heart |
Electrocardiogram (EKG/ECG) | Records the heart's electrical rhythm |
MUGA scan | Measures heart pumping function |
Stress test | Checks the heart under exercise |
Genetic testing | Identifies inherited heart conditions |
How is congestive heart failure treated?
Congestive heart failure has no cure, so treatment with medications and lifestyle changes aims to keep you from moving forward through the stages.
Can Heart Failure Be Cured?
Treatment depends on the type of heart failure and, in part, what caused it [1]. Medications and lifestyle changes are part of every heart failure treatment plan.
There is no cure for heart failure. As it gets worse, the heart muscle pumps less blood to the organs, and you move toward the next stage. Since you can't move backward through the stages, the goal of treatment is to keep you from moving forward through the stages or to slow the progression.
Stage A Treatment
Treatment at Stage A focuses on risk reduction.
Approach | Detail |
Regular exercise | Such as walking every day |
No tobacco | Quit all tobacco products |
Treat high blood pressure | Medication, low-sodium diet, active lifestyle |
Treat high cholesterol | Cholesterol management |
No alcohol or recreational drugs | Avoid completely |
ACE-I or ARB | Given if coronary artery disease, diabetes, high blood pressure, or other vascular/cardiac conditions are present |
Stage B Treatment
Stage B treatment builds on Stage A care.
Approach | Detail |
All Stage A treatments | Continued |
ACE-I or ARB | If ejection fraction (EF) is 40% or lower |
Beta-blocker | If you've had a heart attack and EF is 40% or lower (if not already taking one) |
Aldosterone antagonist | If you've had a heart attack or EF is 35% or less |
Possible surgery or intervention | For coronary artery blockage, heart attack, valve disease (valve repair or replacement), or congenital heart disease |
Stage C Treatment (HFrEF)
Stage C treatment adds further medications and monitoring.
Approach | Detail |
Stage A and B treatments | Continued |
Beta-blocker | Added |
Aldosterone antagonist | Added |
SGLT2 inhibitors | Sodium-glucose transport 2 inhibitors added |
Hydralazine/nitrate combination | If other treatments don't stop symptoms and the patient is African American |
Heart rate–slowing medications | If heart rate stays above 70 beats per minute with ongoing symptoms |
Diuretic ("water pill") | If symptoms continue |
Sodium restriction | Salt limited in the diet |
Daily weight tracking | Tell the provider if weight gains or loses more than 4 pounds |
Possible fluid restriction | Depending on the case |
Possible devices | Cardiac resynchronization therapy (biventricular pacemaker) or an implantable cardiac defibrillator (ICD) |
Even if treatment improves or stops symptoms, treatment must continue to slow progression to Stage D.
Stage D Treatment
Stage D treatment includes everything from Stages A, B, and C, plus evaluation for more advanced options.
Advanced Option | Purpose |
Heart transplant | Replace the failing heart |
Ventricular assist devices | Mechanical circulatory support |
Heart surgery | Structural correction |
Continuous inotropic drug infusion | Strong heart-supporting medications |
Palliative or hospice care | Comfort-focused care |
Treatment for Preserved EF (HFpEF)
For Stage C and Stage D heart failure with preserved ejection fraction (HFpEF), treatment includes Stage A and B therapies, medications for conditions that cause or worsen heart failure — such as atrial fibrillation, high blood pressure, diabetes, obesity, coronary artery disease, chronic lung disease, high cholesterol, and kidney disease — plus a diuretic ("water pill") to reduce or relieve symptoms. An SGLT2 inhibitor is also recommended for many people with HFpEF.
Managing other health conditions is very important, including diabetes, kidney disease, anemia, high blood pressure, thyroid disease, asthma, and chronic lung disease. Some conditions produce signs and symptoms similar to congestive heart failure. If symptoms are new or worsening but not urgent, tell the provider.
Possible Treatment Side Effects
Side Effect | Detail |
Hypotension | Low blood pressure |
Kidney failure | Ongoing kidney harm |
Infections | From frequent hospital visits involving central IVs |
What is the outlook and life expectancy for congestive heart failure?
With the right care, congestive heart failure won't stop you from doing things you enjoy, though one study found life span about 10 years shorter than without heart failure. The prognosis depends on four factors:
Prognosis Factor | Detail |
Heart muscle function | How well the heart muscle is working |
Symptoms | How many and how severe they are |
Treatment response | How well you respond to the treatment plan |
Adherence | How well you follow the treatment plan |
Research gives a broad picture of life expectancy, though every situation is individual. One study found that people with congestive heart failure have a life span about 10 years shorter than people without heart failure. Another study reported these survival rates for chronic heart failure.
Time After Diagnosis | Survival Rate |
One year | 80% to 90% |
Five years | 50% to 60% |
Ten years | 30% |
A different study found expected life spans ranging from three to 20 years after a hospital stay, depending on factors like age and sex. It's important to look at your specific situation when considering prognosis.
Congestive heart failure is a chronic, lifelong condition. You'll need to treat it for the rest of your life.
Can Congestive Heart Failure Be Prevented?
You can't change some risk factors like age, family history, or race. But you can change your lifestyle to give yourself the best chance of preventing heart failure.
Prevention Step | Action |
Healthy weight | Stay at a weight that's healthy for you |
Heart-healthy diet | Eat foods that are good for your heart |
Regular exercise | Stay active |
Stress management | Manage your stress |
No tobacco | Stop using tobacco products |
No alcohol | Don't drink alcohol |
No recreational drugs | Avoid recreational drug use |
Manage other conditions | Take care of medical conditions that increase risk |
How can people live well with congestive heart failure?
Living with congestive heart failure involves daily self-care such as taking medications, staying active, following a low-sodium diet, tracking symptoms and keeping follow-up appointments.
Daily Self-Care
With the right care and treatment plan, many adults still enjoy life even though congestive heart failure limits their activities. Good self-care includes taking medications, being active, following a low-sodium diet, tracking and reporting new or worsening symptoms, and keeping regular follow-up appointments [1].
People with congestive heart failure may need to limit how much salt and/or fluid they consume each day [1]. The provider can give guidelines.
Planning Ahead
Congestive heart failure is a chronic, long-term illness that can worsen quickly. It's a good idea to let the provider and family know your preferences for medical care. Completing an advance directive or living will lets everyone involved in your care know what you want [1]. A living will details the treatments you want — or don't want — to prolong life. It's best to prepare a living will while you're well, in case you aren't able to make these decisions later.
When to See a Healthcare Provider
Tell the provider about new or worsening symptoms [1].
Warning Sign | What to Watch For |
Breathing | Shortness of breath at rest |
Swelling | In the legs or belly |
Weight | Sudden weight gain |
Energy | Constant tiredness |
When to Go to the ER
Go to emergency care when heart failure suddenly gets worse [1]. Providers call this acute decompensated heart failure. They can give medicine and oxygen to improve your condition. Call 911 if you have severe shortness of breath, chest pain, fainting, or coughing up pink, foamy mucus.
Questions to Ask Your Healthcare Provider
Question | Why It Helps |
Which stage of congestive heart failure do I have? | Frames the whole treatment plan |
What's the best treatment for me at this stage? | Clarifies options for your situation |
What kinds of exercise are safe for me to do? | Sets activity boundaries |
Is there a support group for people with congestive heart failure? | Connects you with others managing the condition |
Conclusion
Congestive heart failure means the heart is still working but cannot keep up with the body's blood supply, so fluid gathers in the lungs, legs, and feet. More than 6 million Americans live with it, and it is the leading cause of hospitalization after age 65. Shortness of breath, swelling, sudden weight gain, and fatigue are the signs not to ignore.
There is no cure, and the stages move in one direction. But stage-based treatment — from daily walks and a low-sodium diet to advanced devices and transplant — is designed to slow progression and keep people doing what they enjoy. Daily habits like taking medications, tracking weight, and reporting changes quickly are what make the difference.
Slow the Progression, Keep Living Well
If you notice new shortness of breath, swelling, sudden weight gain, or constant tiredness, see your healthcare provider. Sudden worsening needs emergency care.
Related reading: coronary artery disease guide, heart attack symptoms and treatment
Frequently Asked Questions
1. What is congestive heart failure?
Congestive heart failure is a long-term condition in which the heart can't pump blood well enough to meet the body's needs. The heart is still working, but blood builds up in other parts of the body, most often the lungs, legs, and feet.
2. How common is congestive heart failure?
More than 6 million people in the United States have congestive heart failure. It is the leading cause of hospitalization in people older than 65.
3. What are the first signs of congestive heart failure?
Early signs include shortness of breath, fatigue when active, swelling in the ankles and legs, weight gain, a dry hacking cough, and waking up short of breath at night. Symptoms can be mild or come and go.
4. What causes congestive heart failure?
Causes include coronary artery disease, heart attack, cardiomyopathy (genetic or viral), congenital heart disease, diabetes, high blood pressure, arrhythmia, kidney disease, obesity (BMI above 30), tobacco, alcohol, recreational drugs, and some cancer drugs (chemotherapy).
5. What are the four stages of heart failure?
Stage A means high risk but no symptoms. Stage B means the left ventricle is abnormal or underperforming without symptoms. Stage C means a diagnosis with current or past symptoms. Stage D means advanced symptoms that don't improve with treatment — the final stage.
6. Is there a cure for congestive heart failure?
No. There is no cure for heart failure. The goal of treatment is to keep you from moving forward through the stages or to slow down the progression.
7. What is the life expectancy for congestive heart failure?
Studies show about a 10-year shorter life span for people with heart failure, with survival rates of roughly 80–90% at one year, 50–60% at five years, and 30% at ten years. Expected life spans range from three to 20 years after a hospital stay, depending on age and other factors.
8. What is the life expectancy for stage 4 heart failure?
Stage D (advanced) heart failure has symptoms that don't improve with treatment. At this stage, providers evaluate advanced options such as heart transplant, ventricular assist devices, heart surgery, continuous inotropic drugs, or palliative care.
9. Can you reverse congestive heart failure?
No — you cannot move backward through the heart failure stages. Treatment focuses on slowing progression and managing symptoms for the rest of your life.
10. What should I avoid with congestive heart failure?
Avoid tobacco, alcohol, and recreational drugs; limit salt and possibly fluids; avoid foods high in salt and fat; and avoid an inactive lifestyle. Managing other conditions like diabetes and high blood pressure is also essential.
11. When is heart failure an emergency?
Heart failure is an emergency when it suddenly gets worse — called acute decompensated heart failure. Go to the ER; providers can give medicine and oxygen to improve your condition.
Related Reading
Aldosterone Antagonists: Uses, Types and Side Effects explains aldosterone antagonist medicines.
ACE Inhibitors: Uses, Side Effects and Examples explains how ACE inhibitors lower blood pressure.
BNP Test (B-Type Natriuretic Peptide): Normal Levels and What High BNP Means explains the blood test used to diagnose and track heart failure.
Chest X-Ray (CXR): What It Shows, How It's Done and What Results Mean explains how a chest X-ray can show an enlarged heart or fluid in the lungs.
Cardiac Output: What It Is, Normal Range, How It's Measured and What Affects It explains how providers measure how much blood the heart pumps each minute.
Swan-Ganz Catheterization: What It Measures, How It's Done and Recovery explains how a pulmonary artery catheter measures pressures in the heart and lungs.
Troponin Test: What It Is, Why It's Done, Normal Range and What High Levels Mean explains the heart blood test that can rise with this condition and how results are read.
Revised Cardiac Risk Index (RCRI): What It Measures, How It's Scored and What Your Result Means explains how this six-factor score estimates heart risk before noncardiac surgery and what each class means.
References
Cleveland Clinic. Heart Failure. Cleveland Clinic. September 2, 2026. https://my.clevelandclinic.org/health/diseases/17069-heart-failure-understanding-heart-failure
Vaduganathan M, Docherty KF, Claggett BL, et al. SGLT-2 inhibitors in patients with heart failure: a comprehensive meta-analysis of five randomised controlled trials. Lancet. 2022;400(10354):757-767. doi:10.1016/S0140-6736(22)01429-5. PMID: 36041474.
Molloy CD, Long L, Mordi IR, et al. Exercise-based cardiac rehabilitation for adults with heart failure - 2023 Cochrane systematic review and meta-analysis. Eur J Heart Fail. 2023;25(12):2263-2273. doi:10.1002/ejhf.3046. PMID: 37850321.
Ezekowitz JA, Colin-Ramirez E, Ross H, et al. Reduction of dietary sodium to less than 100 mmol in heart failure (SODIUM-HF): an international, open-label, randomised, controlled trial. Lancet. 2022;399(10333):1391-1400. doi:10.1016/S0140-6736(22)00369-5. PMID: 35381194.
Medical Disclaimer
This article is for informational purposes only and does not constitute medical advice. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read here.
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