Cardiac Cachexia: Why Weight Loss Happens with Advanced Heart Failure and What Helps
Updated: 2 days ago
Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 2026
Quick Answer
Cardiac cachexia is a type of malnutrition and muscle loss affecting people with heart failure, usually in the end stage, defined by unintentional weight loss of 5% during the past year. Treatment includes aerobic exercise, cardiac rehab and treating the underlying heart failure. The outlook is often poor, but prompt diagnosis and treatment can improve your situation.
What the research says
Cachexia is linked to a higher risk of death in heart failure. In a meta-analysis of six studies and 2,252 people with heart failure, those with cachexia had a higher risk of death from any cause (HR 1.60, 95% CI 1.31–1.95); across 10 studies of 2,862 people, about 31% had cachexia (Prokopidis et al., Journal of Cachexia, Sarcopenia and Muscle, 2024 [1]).
It also predicts serious heart events. Nine cohort studies of 3,821 people with heart failure found cachexia was linked to higher all-cause mortality (HR 1.59, 95% CI 1.34–1.89) and major adverse cardiovascular events (HR 2.41, 95% CI 1.50–3.85); prevalence ranged from 11.2% to 37.8% depending on the definition used (Liu et al., Heart, 2025 [2]).
Exercise-based rehab helps people with heart failure. In 60 trials with 8,728 people with heart failure (not cachexia specifically), exercise-based cardiac rehabilitation reduced short-term all-cause hospitalization (RR 0.69, 95% CI 0.56–0.86) and improved quality of life, but did not clearly change short-term mortality (RR 0.93, 95% CI 0.71–1.21) (Molloy et al., European Journal of Heart Failure, 2023 [3]).
What Is Cardiac Cachexia?
Cardiac cachexia (kuh-KEK-see-uh) is a type of malnutrition and muscle loss that affects people with heart failure, usually in the end stage. The word cachexia translates to “bad condition.” It can affect people with multiple illnesses that result in unintentional muscle wasting and weight loss.
Multiple causes combine to make people with heart failure lose weight when they are not trying. Healthcare providers define the amount of unintentional weight loss for cardiac cachexia as 5% during the past year. Others say 6% or more weight loss, along with other symptoms, means you have cardiac cachexia.
How Common Is Cardiac Cachexia?
Cardiac cachexia affects about 10% to 39% of people who have chronic heart failure with symptoms. More than 20 million people in the world have chronic heart failure.
What are the symptoms of cardiac cachexia?
Cardiac cachexia symptoms include unintended loss of more than 5% of your weight in under a year, loss of muscle strength, severe tiredness, low energy and poor appetite.
Losing more than 5% of your weight (fat, not fluid) in less than a year without trying
Losing muscle strength
Feeling very tired
Being unable to complete daily activities because of low energy
Losing your desire to eat
What Causes Cardiac Cachexia?
Multiple factors add up to cause cardiac cachexia in people with severe heart failure, such as:
An imbalance in your metabolism
Eating or drinking too little protein
Not absorbing nutrients well
Not being physically active
What complications can cardiac cachexia cause?
Cardiac cachexia can lead to serious problems such as sarcopenia, frailty and falls, electrolyte and fluid problems, osteoporosis, and worsening that can be fatal.
Sarcopenia: loss of muscle mass, and sometimes scarring of the heart muscle.
Frailty and weakness: which in turn can lead to falls and injuries.
Electrolyte and fluid problems: loss of appetite can lead to electrolyte and fluid derangements.
Osteoporosis: decreased bone density that can make falls and fractures more likely.
Worsening and death: cardiac cachexia can get worse and be fatal.
How Is Cardiac Cachexia Diagnosed?
A healthcare provider can diagnose cardiac cachexia when you have slowly lost 5% or more of your weight during the last year and also have at least three of these issues:
Fatigue
Loss of muscle strength or mass
Anorexia (loss of appetite)
Inflammation
Anemia
Too little of the albumin protein (hypoalbuminemia)
What Tests Are Used?
A provider will order lab tests and imaging tests, such as blood tests, an electrocardiogram (EKG), an echocardiogram, a chest X-ray, a DEXA (DXA) scan, computed tomography (CT), magnetic resonance imaging (MRI), and cardiopulmonary exercise testing.
These tests are important because people with heart failure have swelling that can make it difficult to measure body mass index (BMI). A right heart catheterization can help a provider see how much excess fluid you have. This can also help figure out how much weight you have lost and how much fluid your body is retaining.
How Is Cardiac Cachexia Treated?
Cardiac cachexia treatment is not as simple as eating more food. This complex condition requires more than one kind of approach.
Exercise and Cardiac Rehab
You can expect a provider to tell you to do some aerobic exercise to help prevent more muscle loss. Researchers have found that exercise is one of the best forms of cardiac cachexia treatment. Cardiac rehab can help people with heart failure improve their quality of life, have fewer hospital stays, and live longer.
Hospital Care
A healthcare provider may admit you to the hospital if you are fainting and have very low blood pressure. They will keep checking your weight and how much you are able to eat and drink. You can go home after you take in enough nutrition. Over the next two to four weeks, you will need to see a cardiologist, a nutritionist, and a primary care provider.
Treating the Underlying Heart Failure
If your heart failure is at an advanced stage, it may not be possible to reverse cachexia without treating the underlying heart failure. This may require an appointment with an advanced heart failure specialist. They may be able to prescribe medications or, if appropriate, refer you for surgery, including a mechanical heart pump or a heart transplant.
Medicines and Supplements
A provider may order:
A protein supplement
Vitamins C and E
Omega-3 fatty acids
Anabolic steroids
Human growth hormone (HGH)
Ghrelin receptor agonists
Beta-blockers
Selective androgen receptor modulators
Side effects of the more common medications for cardiac cachexia may include oily skin, ankle swelling, fatigue, nausea, dizziness, and trouble sleeping (insomnia).
Can You Lower Your Risk of Cardiac Cachexia?
To help lower your risk of cardiac cachexia, a provider may prescribe medicines such as angiotensin-converting enzyme (ACE) inhibitors, beta-blockers, loop diuretics, or aldosterone antagonists.
What is the outlook and prognosis for cardiac cachexia?
Cardiac cachexia often has a poor prognosis. However, getting a prompt diagnosis and treatment can help improve your outcome. The sooner you start treatment, the better your chances of improving your situation.
The condition can cause death. About 50% of people who have it die within 18 months, and some people survive only three, six, or 12 months, according to one study.
How can people live with cardiac cachexia?
Living with cardiac cachexia involves eating soft foods and smaller, more frequent meals, following your provider's diet advice, taking recommended supplements and keeping follow-up visits.
Taking Care of Yourself
Eating soft foods may help you avoid shortness of breath while eating. Consuming smaller meals more often may help, too.
Healthcare providers have different opinions on how much salt you should have, so check with your provider for their recommendation. Many providers agree that the Mediterranean Diet and the DASH diet are good for people with cardiac cachexia.
Take any nutritional supplements your provider believes will help you. These can improve your quality of life and survival. Improving your body’s intake of nutrients can also help prepare you for surgery if you are receiving a heart transplant.
Follow-Up Visits
Talk to your healthcare provider about how often they want to see you. You may need frequent check-ins, even if it is just to report your weight and calorie intake.
Questions to Ask Your Doctor
How advanced is my cardiac cachexia?
Can you recommend a specific diet for me?
What are the best nutritional supplements for me?
When should you talk to your healthcare team about cardiac cachexia?
If you have advanced heart failure and notice any weight loss, talk to your healthcare provider right away — even if swelling makes you think you are stable. The swelling that happens in people with heart failure (fluid retention) can hide the fat and muscle loss happening underneath and keep you from seeing how severe the weight loss is.
Also contact your provider if you are fainting or have very low blood pressure, since these may require hospital care. Be an advocate for yourself so you can get the help you need to keep cardiac cachexia from getting worse. Early treatment improves outcomes.
Conclusion
Cardiac cachexia is a serious form of malnutrition and muscle loss that affects people with advanced heart failure, usually in the end stage. Defined as unintentional weight loss of 5% or more in the past year, it affects 10% to 39% of people with chronic heart failure with symptoms. It is caused by a combination of metabolism imbalance, too little protein, poor nutrient absorption, and physical inactivity.
The complications — sarcopenia, frailty, falls, osteoporosis, and electrolyte and fluid problems — and the prognosis are serious. But treatment is not hopeless: aerobic exercise, cardiac rehab, proper nutrition, targeted supplements and medications, and treating the underlying heart failure can all help. The single most important step is to talk to your provider early, because swelling can hide the weight loss. If you or someone you love is facing this diagnosis, take the supplements your provider recommends, follow a Mediterranean or DASH diet, and ask how advanced the condition is and what can be done.
Frequently Asked Questions
What is cardiac cachexia?
Cardiac cachexia is a type of malnutrition and muscle loss that affects people with heart failure, usually in the end stage. Cachexia translates to “bad condition” and can affect people with multiple illnesses, causing unintentional muscle wasting and weight loss.
How much weight loss defines cardiac cachexia?
Healthcare providers define it as 5% unintentional weight loss during the past year. Others say 6% or more weight loss, along with other symptoms, means you have cardiac cachexia.
How common is cardiac cachexia?
Cardiac cachexia affects about 10% to 39% of people who have chronic heart failure with symptoms. More than 20 million people in the world have chronic heart failure.
What are the symptoms of cardiac cachexia?
Losing more than 5% of your weight (fat, not fluid) in less than a year without trying, losing muscle strength, feeling very tired, being unable to complete daily activities because of low energy, and losing your desire to eat.
What causes cardiac cachexia?
Multiple factors add up: an imbalance in your metabolism, eating or drinking too little protein, not absorbing nutrients well, and not being physically active.
What complications can cardiac cachexia cause?
Sarcopenia (muscle loss), sometimes scarring of the heart muscle, frailty and weakness (leading to falls and injuries), electrolyte and fluid problems from loss of appetite, and osteoporosis (lower bone density, making falls and fractures more likely). It can get worse and be fatal.
How is cardiac cachexia diagnosed?
A provider can diagnose it when you have slowly lost 5% or more of your weight during the last year and have at least three of these: fatigue, loss of muscle strength or mass, anorexia (loss of appetite), inflammation, anemia, or too little albumin protein.
What tests are done to diagnose cardiac cachexia?
Blood tests, an electrocardiogram (EKG), an echocardiogram, a chest X-ray, a DEXA (DXA) scan, a CT scan, an MRI, and cardiopulmonary exercise testing. A right heart catheterization can also show how much excess fluid you have compared with how much weight you have actually lost.
Why are imaging and other tests so important?
Because people with heart failure have swelling that makes it difficult to measure body mass index (BMI).
Is treatment just about eating more?
No. Cardiac cachexia treatment is not as simple as eating more food. It requires more than one kind of approach, including exercise, treating the underlying heart failure, and specific medicines and supplements.
What treatments help the most?
Aerobic exercise is one of the best forms of treatment because it helps prevent more muscle loss. Cardiac rehab can improve quality of life, reduce hospital stays, and help people live longer.
What medicines or supplements might a provider order?
A protein supplement, vitamins C and E, omega-3 fatty acids, anabolic steroids, human growth hormone (HGH), ghrelin receptor agonists, beta-blockers, or selective androgen receptor modulators.
What are the side effects of those medicines?
Side effects of the more common medications may include oily skin, ankle swelling, fatigue, nausea, dizziness, and trouble sleeping (insomnia).
Can medicines lower my risk of cardiac cachexia?
To help lower your risk, a provider may prescribe ACE inhibitors, beta-blockers, loop diuretics, or aldosterone antagonists.
What is the prognosis for cardiac cachexia?
Cardiac cachexia often has a poor prognosis — about 50% of people who have the condition die within 18 months, and some survive only three, six, or 12 months. But prompt diagnosis and treatment can improve your outcome; the sooner you start treatment, the better your chances.
Related Reading
References
Prokopidis K, Irlik K, Hendel M, et al. Prognostic impact and prevalence of cachexia in patients with heart failure: a systematic review and meta-analysis. Journal of Cachexia, Sarcopenia and Muscle. 2024;15(6):2536-2543. PMID 39478303. https://doi.org/10.1002/jcsm.13596
Liu B, Wu X, Wang Y, et al. Association between cardiac cachexia and adverse outcomes in patients with heart failure: a meta-analysis of cohort studies. Heart. 2025;111(20):952-959. PMID 40089313. https://doi.org/10.1136/heartjnl-2024-325431
Molloy CD, Long L, Mordi IR, et al. Exercise-based cardiac rehabilitation for adults with heart failure – 2023 Cochrane systematic review and meta-analysis. European Journal of Heart Failure. 2023;25(12):2263-2273. PMID 37850321. https://doi.org/10.1002/ejhf.3046
Cleveland Clinic. Cardiac Cachexia. Cleveland Clinic. Medically reviewed; last updated February 21, 2023. https://my.clevelandclinic.org/health/diseases/24770-cardiac-cachexia
Bielecka-Dabrowa A, Ebner N, Dos Santos MR, et al. Cachexia, muscle wasting, and frailty in cardiovascular disease. European Journal of Heart Failure. 2020;22(12):2314-2326. PMID 32949422. https://doi.org/10.1002/ejhf.2011
Fernández-Pombo A, Rodríguez-Carnero G, Castro AI, et al. Relevance of nutritional assessment and treatment to counteract cardiac cachexia and sarcopenia in chronic heart failure. Clinical Nutrition. 2021;40(9):5141-5155. PMID 34461588. https://doi.org/10.1016/j.clnu.2021.07.027
Lena A, Ebner N, Anker MS. Cardiac cachexia. European Heart Journal Supplements. 2019;21(Suppl L):L24-L27. PMID 31885509. https://doi.org/10.1093/eurheartj/suz241
Valentova M, Anker SD, von Haehling S. Cardiac cachexia revisited: the role of wasting in heart failure. Cardiology Clinics. 2022;40(2):199-207. PMID 35465894. https://doi.org/10.1016/j.ccl.2021.12.008
Krysztofiak H, Wleklik M, Migaj J, et al. Cardiac Cachexia: A Well-Known but Challenging Complication of Heart Failure. Clinical Interventions in Aging. 2020;15:2041-2051. PMID 33173285. https://doi.org/10.2147/CIA.S273967
Wickman BE, Enkhmaa B, Ridberg R, et al. Dietary Management of Heart Failure: DASH Diet and Precision Nutrition Perspectives. Nutrients. 2021;13(12):4424. PMID 34959976. https://doi.org/10.3390/nu13124424
Medical disclaimer
This article 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. Never disregard professional medical advice or delay seeking it because of something you have read on Rinnit.
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