The life expectancy of a dog with an enlarged heart (often Dilated Cardiomyopathy or Mitral Valve Disease) typically ranges from 6 to 12 months once congestive heart failure (CHF) symptoms develop. With early detection and proper medication, some dogs may live 18 months or longer. Prognosis depends heavily on the severity and how well the dog responds to treatment.

How long can my dog live with an enlarged heart?

Once symptoms of heart failure have developed (cough, difficulty breathing, fainting), many dogs can live for 6 to 12 months with heart medications and changes to diet and lifestyle. A much smaller proportion of dogs will live 18 months or longer with careful treatment.

How long can a dog live with a big heart?

Life Expectancy of Dogs with Enlarged Hearts

Unfortunately, most dogs with signs of congestive heart failure when they are diagnosed die as a result of the disease within six months. In the most severe cases, some dogs may survive only weeks to a few months.

What happens when a dog has an enlarged heart?

When a dog's heart is enlarged it becomes difficult for your pup's heart to pump blood around its body to the organs that need it. As the condition progresses the dog's organs, especially lungs and kidneys, will often begin to reduce in function. This progression is what makes dilated cardiomyopathy very serious.

When to euthanize a dog with an enlarged heart?

For these pets, we often consider euthanasia when the symptoms of the disease are leading to a deteriorated quality of life at home.

Congestive Heart Failure & Enlarged Heart in Dogs

Is it good to walk a dog with an enlarged heart?

For most dogs in the early stages of heart disease, yes. Daily, slow, short walks are usually encouraged to maintain body condition and happiness. The key is monitoring their tolerance level and ensuring the activity remains low-impact.

What is the most common cause of an enlarged heart?

The most common causes of an enlarged heart (cardiomegaly) are high blood pressure (hypertension) and coronary artery disease, both of which make the heart work harder, causing its muscle to thicken or chambers to widen as it tries to pump blood more effectively to the body. Other frequent causes include heart valve disease, cardiomyopathy (heart muscle disease), heart attack, and congenital heart defects.
 

How can I reduce my dog's enlarged heart?

If the cause is related to nutrition, such as a deficiency in taurine, treatment can simply involve changes to the dog's diet and supplements. However, most often, treatment involves a combination of medications and therapies to strengthen the dog's heart and improve blood circulation.

What foods cause an enlarged heart in dogs?

Grain-free dog foods with high levels of legumes or potatoes have been linked to diet-related dilated cardiomyopathy (DCM)—a condition that weakens the heart and can lead to sudden collapse or death. DCM affects the heart's ability to pump blood efficiently.

Do dogs with congestive heart failure drink a lot of water?

It will cause your dog to drink and urinate more so please make sure there is always plenty of water available and easy access to outdoors.

What medication is used for dogs with enlarged heart?

Vetmedin® can be used to treat dogs that have asymptomatic MVD with an enlarged heart. By giving dogs Vetmedin® before they start to show symptoms of heart failure it is possible to: Reduce their heart size. Slow down disease progression.

Can a dog's enlarged heart go back to normal?

This disease is managed rather than cured. While there is no cure for DCM, dogs that have nutritionally acquired DCM that is caught early can restore normal heart function with the right therapy.

What not to feed a dog with heart disease?

For dogs with heart disease, avoid high-sodium foods like cured meats, deli items, salty snacks, and most canned foods, as well as excessive milk products, while also being cautious with grain-free diets heavy in peas, lentils, or potatoes due to potential links to dilated cardiomyopathy (DCM). Focus on fresh, low-sodium ingredients, lean meats, and consult your vet for specific low-sodium or therapeutic cardiac diets to manage fluid buildup and support heart function. 

How long can a senior dog live with an enlarged heart?

Generally the life expectancy of dogs with enlarged hearts is 6 to 24 months. While some dogs with an enlarged heart may have a shorter life expectancy, there is no specific or universal time frame for how long a dog can live with an enlarged heart.

Are eggs good for dogs with heart disease?

Note that these points apply to humans as much as dogs. Eggs were given a bad rap for a few decades for being a significant causal factor in cholesterol, now completely disproven. In fact, eggs are shown to be preventative in heart disease!

Is it okay to walk a dog with an enlarged heart?

Your dog will still need regular exercise to help keep them happy, healthy and in shape! If they can't walk as far as they used to, consider cutting their walks down but having a couple more throughout the day if they can cope and make sure to avoid hot weather.

What medicine is good for heart enlargement?

Beta blockers, angiotensin-converting enzyme (ACE) inhibitors or angiotensin II receptor blockers (ARBs) may be used to lower blood pressure and improve heart function. Blood thinners. Blood-thinning medications (anticoagulants) may be given to reduce the risk of blood clots that could cause a heart attack or stroke.

Can stress cause an enlarged heart?

Can stress cause cardiomegaly? Not exactly. There's no direct link between an enlarged heart and stress. However, stress can cause high blood pressure or other cardiac issues, which may contribute to an enlarged heart.

How do I strengthen my dog's heart?

Frequent exercise: Getting your dog adequate exercise including frequent cardiac exercise, helps keep your dog or cat healthy and happy. Consider walking, running, playing, swimming, hiking, or dog-related sports such as flyball and agility.

Does an enlarged heart in a dog mean congestive heart failure?

There are many causes of CHF in dogs, but the two most common causes are: Mitral valve insufficiency (MVI), refers to a leaky mitral valve, which is the valve between the left atrium and the left ventricle. Dilated cardiomyopathy (DCM) occurs when the heart chambers enlarge and lose their ability to contract.

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