Right Heart Failure: Symptoms, Causes, Diagnosis and Treatment

Written by Medicover Team and Medically Reviewed by Dr Jagadeesh Chandra Bose Y , Cardiologists

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1. Causes 2. Find a Doctor 3. Diagnosis 4. Treatment 5. FAQs

Right heart failure, also called right-sided heart failure, occurs when the right ventricle cannot pump blood effectively to the lungs. As a result, blood backs up in the veins, causing fluid to accumulate in the legs, abdomen and other parts of the body.

Right heart failure often develops because of left-sided heart failure or pulmonary hypertension. It can also result from chronic lung disease, heart valve disorders, congenital heart defects or damage to the right ventricle. Early diagnosis and treatment can help control symptoms, reduce complications and improve quality of life.

What Are the Types of Right Heart Failure?

Right heart failure can develop suddenly or gradually. The type depends on how quickly the condition begins and the underlying problem affecting the right side of the heart.

Acute Right Heart Failure: Develops suddenly and may result from a large pulmonary embolism, right ventricular heart attack or another condition that rapidly increases pressure on the right side of the heart.
Chronic Right Heart Failure: Develops gradually due to long-term conditions such as pulmonary hypertension, chronic lung disease or left-sided heart failure.
Isolated Right Heart Failure: Primarily affects the right side of the heart without significant left-sided heart failure.
Biventricular Heart Failure: Occurs when both the right and left sides of the heart are unable to pump blood effectively.

What Are the Symptoms of Right Heart Failure?

Symptoms of right heart failure are mainly caused by blood backing up in the body's veins and fluid accumulating in tissues and organs. The severity of symptoms can vary depending on the underlying cause and progression of the condition.

Swelling in the feet, ankles and legs
Abdominal swelling or ascites
Unexplained weight gain caused by fluid retention
Shortness of breath
Fatigue and weakness
Reduced ability to exercise
Frequent urination at night
Palpitations or an irregular heartbeat
Loss of appetite or nausea
Swelling of the neck veins

Swelling and Fluid Retention

Blood backing up in the veins increases pressure and causes fluid to leak into surrounding tissues. This commonly leads to swelling in the feet, ankles and legs and may also cause rapid weight gain.

Abdominal Swelling

Fluid can accumulate in the abdomen, a condition called ascites. Liver congestion may also cause abdominal discomfort, fullness, nausea or reduced appetite.

Fatigue and Exercise Intolerance

Reduced cardiac output can limit the amount of oxygen-rich blood reaching the body's tissues, leading to tiredness, weakness and difficulty performing normal physical activities.

What Causes Right Heart Failure?

Right heart failure can result from conditions that increase pressure in the lungs, damage the right ventricle or interfere with normal blood flow through the heart.

Left-Sided Heart Failure

Left-sided heart failure is a common cause of right heart failure. When the left side of the heart cannot pump effectively, pressure builds up in the lungs and places additional strain on the right ventricle.

Pulmonary Hypertension

High blood pressure in the arteries of the lungs forces the right ventricle to work harder to pump blood. Over time, the right ventricle can enlarge, weaken and eventually fail.

Chronic Lung Disease

Long-term lung conditions such as chronic obstructive pulmonary disease (COPD) and interstitial lung disease can increase pressure in the pulmonary arteries and lead to right heart failure, sometimes called cor pulmonale.

Pulmonary Embolism

A large blood clot blocking blood flow through the lungs can suddenly increase pressure on the right ventricle and cause acute right heart failure.

Right Ventricular Heart Attack

A heart attack that damages the right ventricle can weaken its ability to pump blood effectively.

Heart Valve Disease

Problems affecting the tricuspid or pulmonary valve can interfere with blood flow through the right side of the heart and contribute to heart failure.

Congenital Heart Defects

Structural heart abnormalities present from birth can place additional strain on the right ventricle and eventually lead to right-sided heart failure.

When to See a Doctor for Right Heart Failure?

Medical evaluation by a Cardiologist is recommended for persistent leg swelling, unexplained weight gain, increasing breathlessness, or severe fatigue. Early assessment is particularly important for people with heart or lung disease because worsening symptoms may indicate fluid overload or declining heart function.

You should see a doctor if you have:

Persistent swelling in the feet, ankles or legs
Increasing shortness of breath or reduced exercise tolerance
Rapid weight gain caused by fluid retention

Get medical help immediately if:

Severe breathing difficulty develops suddenly
Chest pain, fainting or confusion occurs
The lips or skin become blue or grey

These could be signs of severe heart failure or shock, which need urgent medical care.

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How Is Right Heart Failure Diagnosed?

Diagnosis involves evaluating symptoms, medical history and signs of fluid buildup or abnormal heart function. Tests are used to assess the right ventricle and identify the underlying cause.

Physical Examination

A doctor may check for leg swelling, enlarged neck veins, abdominal fluid, abnormal heart sounds and signs of congestion in the liver or other organs.

Echocardiogram

An echocardiogram uses sound waves to assess the size and pumping function of the heart chambers. It can show right ventricular enlargement, reduced function, valve abnormalities and signs of pulmonary hypertension.

Electrocardiogram

An ECG records the heart's electrical activity and can identify abnormal heart rhythms or signs of strain affecting the right ventricle.

Chest X-Ray

A chest X-ray can show heart enlargement and changes in the lungs that may help identify the underlying cause of heart failure.

Blood Tests

Blood tests may assess kidney and liver function, electrolyte levels and biomarkers associated with heart failure. These tests also help guide treatment and monitor complications.

Cardiac MRI or CT Scan

Advanced imaging can provide detailed information about the right ventricle, pulmonary arteries and structural abnormalities affecting the heart or lungs.

Right Heart Catheterisation

Right heart catheterisation directly measures pressures inside the right side of the heart and pulmonary arteries. It may be used when pulmonary hypertension or complex haemodynamic problems are suspected.

How Is Right Heart Failure Treated?

Treatment for right heart failure focuses on relieving fluid buildup, improving heart function and managing the underlying condition. The treatment plan varies depending on whether the condition is caused by left-sided heart failure, pulmonary hypertension, lung disease, valve disease or another problem.

Diuretics

Diuretics help the kidneys remove excess salt and water from the body.
They can reduce swelling, abdominal fluid and other symptoms of congestion.

Treatment of the Underlying Cause

Left-sided heart failure, lung disease, pulmonary embolism and other underlying conditions require specific treatment.
People with certain forms of pulmonary hypertension may receive specialised medicines that reduce pressure in the pulmonary arteries.

Heart Failure Medications

When right heart failure occurs with left-sided heart failure, medicines may be prescribed to reduce the workload on the heart and improve long-term outcomes.
The choice of medication depends on heart function, blood pressure, kidney function and the underlying cause.

Oxygen Therapy

Supplemental oxygen may be needed when low blood oxygen levels are caused by lung disease or other conditions.

Heart Valve Procedures

Repair or replacement of a severely damaged heart valve may be recommended when valve disease is contributing to right heart failure.

Advanced Treatment

People with severe or end-stage heart failure may require specialised mechanical circulatory support or a heart transplant.

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What Are the Risk Factors for Right Heart Failure?

Conditions that damage the heart, increase pressure in the pulmonary arteries or affect lung function can increase the risk of developing right heart failure.

Left-sided heart failure
Pulmonary hypertension
Chronic lung disease
Previous heart attack
Heart valve disease
Congenital heart defects
Coronary artery disease
Abnormal heart rhythms
Obesity
Obstructive sleep apnoea

How Can Right Heart Failure Be Managed?

Long-term management can help control fluid retention, reduce symptoms and prevent worsening heart failure. Lifestyle recommendations should be personalised according to the underlying condition and overall health.

Limit Salt Intake: Reducing sodium can help decrease fluid retention.
Monitor Body Weight: Sudden weight gain may indicate worsening fluid buildup.
Take Medicines as Prescribed: Regular treatment helps control symptoms and the underlying cause.
Stay Physically Active: Appropriate exercise or cardiac rehabilitation may improve strength and functional ability.
Avoid Smoking: Smoking can worsen heart and lung disease.
Attend Regular Follow-Up Visits: Ongoing monitoring helps detect changes in symptoms, kidney function and fluid balance.

What Are the Complications of Right Heart Failure?

Without effective treatment, right heart failure can cause progressive fluid buildup and reduced blood flow to vital organs.

Severe swelling and fluid retention
Ascites
Liver congestion and liver dysfunction
Kidney dysfunction
Abnormal heart rhythms
Blood clots
Low blood pressure
Cardiogenic shock
Progressive heart failure

What Is the Outlook for Right Heart Failure?

The outlook for right heart failure depends on the underlying cause, severity of right ventricular dysfunction and response to treatment. Some causes can be treated effectively, while chronic conditions may require lifelong medical care.

Early diagnosis, appropriate treatment of the underlying disease, careful fluid management and regular follow-up can help improve symptoms and quality of life. People with advanced disease may require specialised heart failure or pulmonary hypertension care.

Frequently Asked Questions

1. What causes right heart failure?

Right heart failure occurs when the right side of the heart cannot pump blood effectively. Common causes include left-sided heart failure, pulmonary hypertension, chronic lung disease, heart valve disorders, congenital heart disease, and right ventricular heart attack.

2. What are the symptoms of right heart failure?

Symptoms may include swelling in the legs, ankles, or abdomen, rapid weight gain from fluid retention, fatigue, shortness of breath, neck vein swelling, reduced appetite, and frequent urination at night.

3. How is right heart failure treated?

Treatment depends on the cause and may include diuretics to reduce excess fluid, medications to manage heart or lung disease, treatment of pulmonary hypertension or valve disorders, and lifestyle changes such as limiting sodium.

4. How is right heart failure diagnosed?

Diagnosis may involve a physical examination, blood tests, electrocardiogram (ECG), echocardiogram, chest X-ray, and other imaging tests. Right heart catheterization may be used to measure pressures inside the heart and lungs.

5. How can right heart failure be prevented?

Risk may be reduced by controlling high blood pressure, managing heart and lung diseases, avoiding smoking, maintaining a healthy weight, exercising as advised, and taking prescribed medications consistently.

6. What is the difference between right and left heart failure?

Left-sided heart failure mainly causes blood and fluid to back up into the lungs, leading to shortness of breath. Right-sided heart failure mainly causes blood to back up in the body's veins, leading to swelling and fluid buildup.

7. Can you live with right heart failure?

Yes. Many people live for years with right heart failure when the underlying cause is treated and symptoms are well managed. The outlook depends on the severity, cause, response to treatment, and other health conditions.