Heart Failure Management

Introduction

A diagnosis of heart failure can feel frightening, in part because of the name itself. It is important to know that “heart failure” does not mean the heart has stopped or is about to stop. It means the heart is not pumping or filling as efficiently as the body needs. With structured, ongoing care, many people live active and meaningful lives for many years after diagnosis.

Heart failure management is the long-term plan that supports the heart, reduces symptoms, and slows the disease. It typically combines medications, lifestyle changes, regular monitoring, and — in selected cases — devices or surgery. Over the past two decades, advances in medication and device therapy have meaningfully changed what life with heart failure looks like.

This guide is written for people who already have a diagnosis of heart failure or are being evaluated for it, and for the families who support them. It explains what the condition is, how it is classified, what current treatment looks like, what to expect day to day, and how to recognise warning signs that should prompt urgent contact with your care team.

What Is Heart Failure?

Heart failure is a chronic condition in which the heart cannot pump enough blood, or cannot fill with enough blood, to meet the body’s needs. When this happens, blood can back up in the lungs, legs, or abdomen, and organs may not receive the oxygen and nutrients they require. This is why the common symptoms are breathlessness, swelling, and fatigue.

The heart and circulatory system showing: ① weakened left ventricle, ② fluid backing up into the lungs, ③ right ventricle, ④ fluid congestion in the lower body and legs.

*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.

Heart failure is sometimes called congestive heart failure (CHF) when fluid buildup is a prominent feature. The terms are often used interchangeably in clinical practice.

It is helpful to think of heart failure as a syndrome rather than a single disease. Many different problems — coronary artery disease, high blood pressure, valve disease, diabetes, or damage from a previous heart attack — can lead to it. The management plan depends on both the type of heart failure and what caused it.

How Doctors Stage Heart Failure

The four NYHA heart failure functional classes showing: ① Class I — no limitation, ② Class II — slight limitation, ③ Class III — marked limitation, ④ Class IV — symptoms at rest.

*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.

Two staging systems are widely used. The American College of Cardiology and American Heart Association (ACC/AHA) describe four stages (A through D), which capture the full arc from being at risk of heart failure to having advanced disease. The New York Heart Association (NYHA) functional classes (I to IV) describe how much symptoms limit daily activity at any given time.

• NYHA Class I: No limitation of ordinary activity.
• NYHA Class II: Slight limitation; comfortable at rest but ordinary activity causes symptoms.
• NYHA Class III: Marked limitation; less than ordinary activity causes symptoms.
• NYHA Class IV: Symptoms at rest, and any activity increases discomfort.

Knowing your stage and class helps your doctor decide which treatments will help most, and helps you track changes over time.

Types of Heart Failure

Heart Failure with Reduced Ejection Fraction (HFrEF)

Side-by-side comparison of: ① HFrEF — dilated, weakened heart with reduced pumping, ② HFpEF — thickened, stiff heart wall with impaired filling.

*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.

Heart Failure with Preserved Ejection Fraction (HFpEF)

Sometimes called diastolic heart failure. The heart pumps normally but is too stiff to fill properly between beats, so less blood is available to pump out. The ejection fraction is 50% or higher. HFpEF is common in older adults, women, and people with high blood pressure, diabetes, or obesity. Treatment options have expanded in recent years, particularly with the addition of SGLT2 inhibitors.

Heart Failure with Mildly Reduced Ejection Fraction (HFmrEF)

An intermediate category, with an ejection fraction between 41% and 49%. Many of the medications that help HFrEF are also used here.

Other Useful Distinctions

• Left-sided vs right-sided: Left-sided failure often causes lung congestion and breathlessness. Right-sided failure often causes leg, ankle, and abdominal swelling. The two frequently coexist.
• Acute vs chronic: Acute heart failure develops or worsens suddenly and may need hospital care. Chronic heart failure is the long-term, ongoing form.
• Compensated vs decompensated: Compensated means symptoms are stable on current treatment. Decompensated means symptoms have worsened and treatment needs adjustment.

Causes and Risk Factors

Heart failure is usually the end result of another heart or systemic condition that has stressed the heart over time. Identifying the underlying cause is a central part of management because treating that cause — opening a blocked artery, controlling blood pressure, repairing a leaking valve — can sometimes meaningfully improve heart function.

Common underlying causes include:

• Coronary artery disease and previous heart attacks
• Long-standing high blood pressure (hypertension)
• Cardiomyopathy (disease of the heart muscle itself), which can be inherited, viral, alcohol-related, or related to pregnancy
• Heart valve disease
• Abnormal heart rhythms, especially atrial fibrillation
• Diabetes
• Congenital heart disease
• Thyroid disease, severe anaemia, or chronic lung disease in some cases
• Damage from certain chemotherapy or radiation treatments

Risk factors that increase the likelihood of developing heart failure include older age, smoking, obesity, sedentary lifestyle, sleep apnoea, high alcohol intake, and a family history of cardiomyopathy.

Recognising Symptoms and Worsening

If you have a diagnosis of heart failure, the most important skill to develop is recognising changes in your own pattern of symptoms. Many flare-ups can be caught early and managed at home or in clinic, rather than needing hospital admission, if you notice them quickly.

Common symptoms of heart failure include:

• Shortness of breath, especially with activity or when lying flat
• Waking at night feeling breathless and needing to sit up
• Swelling of the ankles, legs, or abdomen
• Fatigue and reduced exercise tolerance
• A persistent cough or wheeze, sometimes producing pink-tinged phlegm
• Loss of appetite or nausea (from a congested gut)
• Rapid or irregular heartbeat
• Difficulty concentrating

Body diagram showing key heart failure warning signs: ① breathlessness and lung congestion, ② ankle and leg swelling, ③ abdominal distension, ④ rapid or irregular heartbeat, ⑤ fatigue and reduced exercise tolerance.

*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.

Diagnosis

Most readers of this article will already have been diagnosed, but it is helpful to understand the tests because many are repeated during follow-up to track progress.

Clinical Assessment

The doctor takes a detailed history of symptoms, listens to the heart and lungs, checks blood pressure, examines the legs for swelling, and looks at the neck veins. This examination guides which tests are needed next.

Blood Tests

BNP or NT-proBNP are hormones released by the stretched heart muscle. Elevated levels support a diagnosis of heart failure and are also useful for tracking response to treatment. Other blood tests check kidney function, electrolytes (sodium and potassium), thyroid function, blood sugar, and iron stores, all of which influence treatment choices.

Electrocardiogram (ECG)

A simple, painless recording of the heart’s electrical activity. It can show evidence of a past heart attack, abnormal rhythms, or thickened heart muscle.

Echocardiogram

Patient lying on an examination table during a cardiac ultrasound echocardiogram procedure.

*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.

Other Imaging

Chest X-ray can show fluid in the lungs or an enlarged heart. Cardiac MRI gives detailed information about the heart muscle and is helpful in selected cases, such as suspected inflammation or specific cardiomyopathies. CT or coronary angiography may be used when coronary artery disease is suspected as the cause.

Stress Testing and Functional Assessment

Exercise or pharmacological stress tests assess how the heart responds to demand. A six-minute walk test or cardiopulmonary exercise testing may be used to gauge functional capacity, particularly when advanced therapies are being considered.

Treatment and Management

Heart failure care is best understood as a long-term partnership between you and your care team. The plan typically has several components working together: medications, treatment of the underlying cause, lifestyle measures, monitoring, and — when needed — devices or surgery. Current guidelines from the American Heart Association, American College of Cardiology, Heart Failure Society of America (AHA/ACC/HFSA), and the European Society of Cardiology (ESC) are broadly aligned on the core approach.

The Four Pillars of Medical Therapy for HFrEF

The heart and blood vessels showing where the four pillars of HFrEF therapy act: ① ARNI/ACE inhibitor/ARB — blood vessel relaxation, ② beta-blocker — heart rate and muscle protection, ③ MRA — hormonal fluid control at the kidney, ④ SGLT2 inhibitor — kidney glucose and fluid regulation.

*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.

1. ARNI, ACE inhibitor, or ARB. An angiotensin receptor–neprilysin inhibitor (ARNI, such as sacubitril/valsartan) is favoured in current guidelines, with ACE inhibitors or ARBs as alternatives. These medications relax blood vessels and reduce strain on the heart.
2. Beta-blocker. Slows the heart rate, reduces blood pressure, and protects the heart muscle. Examples include carvedilol, bisoprolol, and metoprolol succinate.
3. Mineralocorticoid receptor antagonist (MRA). Such as spironolactone or eplerenone. These reduce harmful hormone effects on the heart and help control fluid.
4. SGLT2 inhibitor. Such as dapagliflozin or empagliflozin. Originally developed for diabetes, these are now a pillar of heart failure care for HFrEF, HFmrEF, and HFpEF, regardless of whether the person has diabetes.

Other medications are added in specific situations — for example, diuretics (water tablets) such as furosemide to control fluid buildup, ivabradine to slow the heart rate in selected cases, hydralazine and nitrates in particular populations, digoxin in some symptomatic patients, and vericiguat in advanced disease.

Medications for HFpEF and HFmrEF

For heart failure with preserved or mildly reduced ejection fraction, SGLT2 inhibitors are now part of standard treatment based on recent evidence. Diuretics are used to control fluid. Treating the conditions that drive HFpEF — especially blood pressure, atrial fibrillation, obesity, sleep apnoea, and diabetes — is a central part of management.

Treating the Underlying Cause

Where heart failure has a treatable cause, addressing that cause can improve heart function:

• Revascularisation (angioplasty or bypass surgery) for severe coronary artery disease
• Valve repair or replacement for significant valve disease
• Rhythm control or rate control for atrial fibrillation
• Tight blood pressure and blood sugar control
• Stopping alcohol or other contributing exposures
• Treatment of sleep apnoea where present

Acute Decompensation and Hospital Care

When symptoms suddenly worsen — severe breathlessness, large weight gain from fluid, or oxygen levels falling — hospital admission may be needed. Treatment typically includes intravenous diuretics, oxygen, careful monitoring, and adjustment of long-term medications. Most people return home within a few days as fluid is removed and symptoms settle.

Lifestyle and Self-Management

Day-to-day choices have a meaningful effect on how heart failure progresses and how you feel. The points below summarise what major heart societies advise; the specifics should be tailored to you in conversation with your care team.

Diet and Fluid

• Salt: Most guidelines recommend limiting salt intake, as excess salt causes the body to retain fluid. A common target is no more than around 5–6 grams of salt (roughly a teaspoon) per day, but your doctor may suggest a different limit.
• Fluid: A daily fluid limit (often 1.5–2 litres) may be advised, particularly if you have significant fluid retention or low sodium levels in the blood. Not everyone with heart failure needs strict fluid restriction.
• Balanced eating: A diet rich in vegetables, fruit, whole grains, legumes, fish, and nuts — broadly Mediterranean in style — is associated with better cardiovascular outcomes.
• Alcohol: If alcohol was a contributing cause, complete abstinence is usually advised. Otherwise, alcohol should be very limited.

Daily Weight Monitoring

Physical Activity and Cardiac Rehabilitation

Once symptoms are stable, regular physical activity is part of standard care. Cardiac rehabilitation — a supervised, gradual programme of exercise and education — has been shown to improve symptoms, exercise capacity, and quality of life in people with heart failure. The right level of activity varies widely, and your team can help you build up safely.

Smoking and Vaping

Stopping smoking is one of the most impactful changes a person with heart failure can make. Support, nicotine replacement, and counselling are widely available.

Vaccinations

Infections, particularly chest infections, can trigger heart failure flare-ups. Annual influenza vaccination, pneumococcal vaccination, and COVID-19 vaccination are recommended by major heart societies for people with heart failure.

Sleep

Obstructive sleep apnoea is common in heart failure and worsens outcomes. If you or your partner notice loud snoring, pauses in breathing, or daytime sleepiness, ask your doctor about evaluation.

Mental Health

Depression and anxiety are common after a diagnosis of heart failure and can affect both quality of life and adherence to treatment. They are treatable, and discussing how you feel with your care team is an important part of care.

Devices and Advanced Therapies

For some people, medication and lifestyle measures are not enough on their own, and devices or surgery are considered. These are typically discussed when heart failure is more advanced or when specific findings on testing point toward them.

Implantable Cardioverter Defibrillator (ICD)

Chest anatomy showing implanted heart failure devices: ① ICD generator under the collarbone, ② ICD lead in the right ventricle, ③ CRT additional lead to the left ventricle, ④ LVAD pump at the left ventricular apex, ⑤ LVAD outflow graft to the aorta.

*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.

Cardiac Resynchronisation Therapy (CRT)

Mechanical Circulatory Support

A left ventricular assist device (LVAD) is a mechanical pump implanted to help a weakened heart pump blood. LVADs are used as a bridge to heart transplant or, in some cases, as long-term therapy. They are reserved for advanced disease and require specialised centres for ongoing care.

Heart Transplant

For advanced heart failure that is not responding to other treatments, heart transplant may be considered. It involves a detailed evaluation, time on a waiting list, lifelong immunosuppressant medication, and close follow-up. Transplant is offered in selected specialist centres and is suitable only for some patients.

Newer and Specialised Procedures

In specific situations, procedures such as transcatheter mitral valve repair (for functional mitral regurgitation that worsens heart failure), atrial fibrillation ablation, or surgical revascularisation may be used as part of a wider plan.

Monitoring and Follow-up

Heart failure is not a “treat once and done” condition. Regular follow-up allows your team to check how you are feeling, adjust medications, and catch problems early.

Follow-up commonly includes:

• Clinic visits, more frequent at first and as symptoms change, less frequent when stable
• Repeat blood tests for kidney function, electrolytes, and BNP/NT-proBNP
• Repeat echocardiograms at intervals to track ejection fraction and heart structure
• Reviewing medications and titrating to target doses
• Device checks if you have an ICD, CRT, or LVAD
• Cardiac rehabilitation, where available

Many people benefit from being seen in a dedicated heart failure clinic, where nurses, pharmacists, and doctors work together to optimise care.

Complications

Heart failure can affect many parts of the body if it progresses, which is one of the reasons proactive management matters. Possible complications include:

• Repeated hospital admissions for decompensation
• Worsening kidney function (cardiorenal syndrome)
• Liver congestion
• Atrial fibrillation and other abnormal rhythms
• Increased risk of blood clots and stroke
• Sudden cardiac death from dangerous rhythms
• Anaemia and iron deficiency, which can worsen symptoms
• Muscle wasting and reduced fitness over time
• Depression and reduced quality of life

Many of these can be reduced or managed with consistent treatment and follow-up.

Living with Heart Failure

Daily heart failure self-management routine showing: ① morning weight check, ② taking medications, ③ light physical activity, ④ low-salt meal, ⑤ symptom diary entry before bed.

*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.

Work and Daily Activity

Many people continue to work, though physically demanding jobs may need to be modified. Pacing activities — alternating effort with rest — helps manage fatigue.

Travel

Travel is usually possible with planning. Carry a list of your medications and a brief summary of your condition. For long flights, move your legs regularly and follow your team’s advice on hydration. High-altitude destinations and very hot climates can be harder on the heart and are worth discussing in advance.

Sexual Activity

Sexual activity is generally safe in stable heart failure. If you experience symptoms during sex, or if you take nitrate medication, discuss this with your doctor before using medications for erectile dysfunction, as some combinations are unsafe.

Pregnancy

Pregnancy places major additional stress on the heart. For women of reproductive age with heart failure, pregnancy planning should be discussed in advance with both a cardiologist and an obstetrician, as some heart failure medications are not safe during pregnancy.

Driving

Most people with stable heart failure can drive. Restrictions may apply after an ICD shock or certain procedures; your team will advise based on local rules.

Advance Care Planning

For people with advanced heart failure, conversations about goals of care, preferences in a future crisis, and the role of palliative care alongside cardiac treatment are an important part of comprehensive management. Palliative care is not the same as end-of-life care; it focuses on symptom relief and quality of life and can run alongside active treatment.

Heart Failure in Children

Heart failure also occurs in children, though the causes are different from adults. In children, it most often relates to congenital heart disease, cardiomyopathies (which can be genetic), viral myocarditis (inflammation of the heart muscle), or complications of treatments such as certain chemotherapies.

Symptoms vary by age. In infants, signs include poor feeding, sweating during feeds, slow weight gain, rapid breathing, and irritability. In older children, symptoms more closely resemble those in adults — tiredness, breathlessness with activity, and swelling.

Management is led by paediatric cardiologists and may include medications adapted for children, treatment of any underlying congenital problem (sometimes with surgery), and, in advanced cases, mechanical support or heart transplant. Many of the medications used in adult heart failure have specific paediatric considerations, and care is highly individualised.

Families of children with heart failure benefit from coordinated care that includes the paediatric cardiology team, the paediatrician, school support, and psychological support for both child and family.

Preventing Progression and Complications

Once heart failure has developed, the goal of prevention is to slow progression, avoid hospital admissions, and reduce complications. The strongest tools are the ones already described — taking all prescribed medications consistently, attending follow-up, recognising worsening early, managing blood pressure and diabetes, staying physically active within limits, and avoiding smoking and excess alcohol.

For people without heart failure but with risk factors (Stage A in the ACC/AHA framework), prevention focuses on controlling blood pressure, cholesterol, blood sugar, and weight, and on healthy lifestyle habits.

When to Seek Urgent Care

Contact your care team promptly — the same day — if you notice:

• Weight gain of more than about 1.5–2 kg over 2–3 days
• New or increased swelling in the legs, ankles, or abdomen
• Increased breathlessness with your usual activities
• Needing more pillows than usual to sleep, or waking breathless
• New or worsening cough
• Lightheadedness, fainting, or new palpitations

Seek emergency medical care immediately if you have:

• Severe breathlessness, especially at rest
• Chest pain or pressure that does not settle
• Coughing up pink, frothy sputum
• A fast or irregular heartbeat with dizziness or fainting
• Sudden, severe weakness on one side of the body, slurred speech, or facial drooping (possible stroke)
• A shock from an implanted defibrillator

Frequently Asked Questions

Does “heart failure” mean my heart is about to stop?

No. Heart failure means the heart is not pumping or filling as efficiently as the body needs. With current treatment, many people live well for many years.

Can heart failure be cured?

For most people, heart failure is a long-term condition that is managed rather than cured. In selected situations — for example, when an underlying cause such as a valve problem, alcohol use, or thyroid disease can be fully treated — heart function can sometimes recover substantially. Your cardiologist can advise on what is realistic for your specific situation.

How quickly will I feel better after starting treatment?

Some symptoms, particularly fluid-related breathlessness and swelling, often improve within days of starting diuretics. The longer-term benefits of the four-pillar medications build up gradually over weeks to months, as doses are increased toward target levels.

Why am I on so many medications?

Each medication targets a different mechanism that contributes to heart failure. Used together, they have a larger combined effect on symptoms, hospital admissions, and survival than any one alone. Your team aims for the lowest effective doses you can tolerate well.

Can I exercise with heart failure?

For most people with stable heart failure, regular, moderate physical activity is encouraged and is part of standard care. Cardiac rehabilitation, where available, is a structured way to begin. Your team can advise on the right level for you.

Is it safe to fly?

Most people with stable heart failure can fly. Long flights, very high altitude, and very hot destinations carry more risk and are worth discussing in advance. Carry medications in your hand luggage along with a brief medical summary.

Can I still have a normal sex life?

In stable heart failure, sexual activity is usually safe. If you take nitrates, avoid medications for erectile dysfunction unless your doctor confirms it is safe. Discuss any symptoms during sex with your team.

What about diet supplements and herbal medicines?

Some over-the-counter and herbal products can interact with heart failure medications or worsen the condition (for example, products high in salt or licorice, and some anti-inflammatory painkillers). Always tell your doctor and pharmacist about any supplements you take.

Will I need a heart transplant?

Most people with heart failure do not need a transplant. It is reserved for advanced disease that has not responded to other treatments, and it requires a detailed evaluation in a specialist centre.

How often will I need follow-up?

Visits are usually more frequent when treatment is being started or adjusted, and less frequent when you are stable. Your team will set a schedule based on your situation and may include shared care between a cardiologist, heart failure nurse, and your primary doctor.

Conclusion

Heart failure is a chronic condition, but it is also a treatable one. Modern management combines medications that work together, lifestyle measures that you control day to day, careful monitoring, and — when appropriate — devices or surgery. The aim is not only to add years of life but to make daily life feel better and more predictable.

The most important partnerships in heart failure care are between you and your medical team, and between you and the people who support you at home. Knowing your type of heart failure, your medications, your warning signs, and the daily habits that protect your heart gives you a meaningful role in your own care — and a foundation from which to live well with the diagnosis.