What are the Symptoms of Heart Disease in Dogs and How Should They Be Treated?
Heart disease is observed more frequently in dogs than in cats. Dogs with heart disease and resulting heart failure may exhibit various symptoms such as fatigue, coughing, and decreased appetite.

Heart disease is observed more frequently in dogs than in cats. Dogs with heart disease and resulting heart failure may exhibit various symptoms such as fatigue, coughing, and decreased appetite. Since the symptoms of heart disease in dogs can vary, knowing these symptoms is crucial for early detection and consultation with a veterinarian. In this article, you can find information about heart diseases in dogs and the symptoms of heart disease in dogs. Causes of Heart Diseases in Dogs Heart diseases in dogs do not occur for a single reason. Usually, multiple risk factors lead to the development of symptoms of heart disease in dogs. It can be stated that factors such as genetic predisposition, obesity, aging, and nutrition can cause the development of heart disease in dogs. Heart disease in dogs can occur in different types; the type of disease can cause variations in the symptoms. The Most Common Heart Diseases in Dogs Heart diseases in dogs can be congenital or can develop later due to nutrition, breed predisposition, or lifestyle. Congenital heart diseases can also be defined as "inherent heart diseases," and in this case, dogs experience heart problems from the moment they are born. The symptoms of congenital heart diseases generally worsen over time. Congenital heart diseases are mostly caused by genetic factors. Some dogs are more prone to heart disease. Following a healthy diet, exercising, and leading a stress-free life can help control the symptoms of congenital heart disease in dogs. Heart disease in dogs can also develop later in life. Some heart diseases (valvular disease – heart valve disease) are particularly dangerous for small breed dogs, while others (myocardial disease) affect larger breed dogs more. Sometimes, untreated infections can also cause heart disease in dogs. Unlike congenital heart diseases, acquired disorders can be prevented. Regular vaccinations, consistent exercise, and nutrition appropriate for their developmental stages can help answer the question, "How can heart disease be prevented in dogs?". You can view dog foods formulated specifically for different developmental stages and their ingredients by clicking here.
Causes of Heart Disease in Dogs
Heart disease in dogs does not arise from a single cause. Usually, multiple risk factors lead to the development of symptoms of heart disease in dogs. Factors such as genetic predisposition, obesity, aging, and nutrition can contribute to the development of heart disease in dogs. Heart disease in dogs can manifest in different ways; the type of disease can cause variations in symptoms.

The Most Common Heart Diseases in Dogs
Heart disease in dogs can be congenital or acquired due to nutrition, breed predisposition, or lifestyle. Congenital heart diseases, also known as "birth defects," mean that dogs experience heart problems from birth. Symptoms of congenital heart disease usually worsen over time. The source of congenital heart disease is mostly genetic factors. Some dogs are more susceptible to heart disease. Following a healthy diet, exercising, and leading a stress-free life can help control the symptoms of congenital heart disease in dogs.
Heart diseases in dogs can also develop later in life. Some heart diseases (valvular disease – heart valve disease) are particularly dangerous for small breed dogs, while others (myocardial disease) affect larger breed dogs more. Sometimes, untreated infections can also cause heart disease in dogs. Unlike congenital heart diseases, acquired disorders can be prevented. Regular vaccinations, consistent exercise, and nutrition appropriate for their developmental stages can help answer the question "how to prevent heart disease in dogs?". You can view dog foods formulated specifically for different developmental stages and their ingredients by clicking here.
Mitral Valve Insufficiency
The valves that control blood flow in the heart are called valves. With each heartbeat, the valves open to allow blood to pass through and then close to prevent blood from leaking back. Mitral valve disease causes the mitral valve to thicken, resulting in a restricted ability to close. When the mitral valve cannot close properly, blood leaks back, and the heart has to work harder to pump enough blood to the body. Mitral valve disease increases the risk of developing heart failure in dogs.
Symptoms of Mitral Valve Insufficiency in Dogs
Symptoms of heart disease in dogs can vary depending on the disease and its progression. Symptoms of mitral valve disease in dogs, which can be diagnosed by veterinarians, may include heart murmur, coughing that increases at night while sleeping or resting, decreased energy, increased breathing rate, fainting, and weight loss. Diagnosis of mitral valve insufficiency in dogs may require ultrasound scans, X-rays, blood tests, and an ECG. Myocarditis Myocarditis, also known as heart inflammation, is a heart disease in dogs caused by swelling of the heart muscle. It often shows no symptoms until it leads to heart failure. This heart disease, which can be caused by viral diseases, infections, injury, exposure to toxins, and mineral deficiencies, is not always easy to determine the exact cause.
Myocarditis
Myocarditis, also called heart inflammation, is a heart disease in dogs caused by swelling of the heart muscle. It often shows no symptoms until it leads to heart failure. This heart disease, which can arise from causes such as viral illnesses, infections, injury, exposure to toxins, and mineral deficiencies, is not always easy to pinpoint the exact cause.
Symptoms of Myocarditis in Dogs
Symptoms of myocarditis, which can be diagnosed using various diagnostic methods such as complete blood count, blood gas measurement, x-ray, ECG, and echocardiography, include fever, loss of appetite, joint swelling, joint pain, arrhythmia, difficulty breathing, weakness, and heart murmur.

Dilate Kardiyomiyopati
This is a common disease that usually affects large breed dogs such as Dobermans, Irish Wolfhounds, and Great Danes. It is also quite common in Cocker Spaniels. The disease may not cause any symptoms until it reaches its later stages. Dilated cardiomyopathy is characterized by the enlargement of the chambers in the heart. The walls of the left ventricle thin and stretch, reducing the heart's ability to pump blood to the body. Because the heart cannot send enough blood to the body, blood flow to the body decreases. This can trigger arrhythmias and the development of congestive heart failure in dogs. Symptoms of Dilated Cardiomyopathy in Dogs As mentioned earlier, this disease may not always lead to noticeable symptoms. Clinical signs may include various symptoms such as weakness, coughing, shortness of breath, arrhythmia, and gagging. Congestive Heart Failure Heart failure, rather than being a heart disease in itself, can be considered a condition or complication that can develop as a result of various problems and threaten health. Heart failure, which occurs when the heart weakens and cannot send enough blood to the body, is among the most common health problems in dogs. Heart failure in dogs can be divided into different types, and the symptoms it causes may differ depending on the breed.
Symptoms of Dilated Cardiomyopathy in Dogs
As mentioned earlier, this disease may not always lead to noticeable symptoms. Clinical signs may include various symptoms such as weakness, coughing, shortness of breath, arrhythmia, and gagging.
Congestive Heart Failure
Heart failure, rather than being a heart disease in itself, can be considered a condition or complication that can develop as a result of various problems and threaten health. Heart failure, which occurs as a result of the heart weakening and not being able to send enough blood to the body, is among the most common health problems in dogs. Heart failure in dogs can be divided into different types, and the symptoms it causes may differ depending on the type.
Symptoms of Heart Failure in Dogs
Symptoms of heart failure in dogs can vary depending on the cause of heart failure and the affected heart chamber. Symptoms of left-sided congestive heart failure in dogs are related to increased pressure in the vessels that carry blood to the left ventricle. This can cause fluid to accumulate in the lungs, leading to a respiratory system disorder called pulmonary embolism. Coughing, difficulty breathing, and difficulty exercising are among the most common symptoms. In addition to all these, dogs with left-sided congestive heart failure often faint due to reduced blood flow to the brain. They may also experience symptoms such as low blood pressure and decreased heart rate. If heart failure is right-sided, fluid accumulation may be observed in the abdominal area, chest cavity, liver, and limbs. In conclusion, symptoms of heart disease in dogs can vary depending on the disease, its progression, etc. When symptoms such as coughing, weakness, difficulty breathing, respiratory distress, fainting, fatigue, and decreased appetite, which are among the most common symptoms, are encountered, it is crucial to seek the expertise of a veterinarian. Treatment Methods for Heart Diseases in Dogs Treatment methods for heart diseases in dogs are determined on a case-by-case basis. While some heart diseases may require surgery, others may require the simultaneous use of one or more medications or monitoring of the disease. Treatment for heart disease in dogs generally aims to control the symptoms of heart disease, minimize damage to the heart muscle, control fluid reaching the lungs, improve blood circulation, regulate heart rhythm, reduce the risk of blood clots, and increase oxygen levels in the blood. When heart disease in dogs is diagnosed early and treated with the correct methods, it is possible to improve the quality of life of dogs with heart disease. How to Prevent Heart Disease in Dogs? While it is not very possible to prevent congenital heart disease in dogs, it is possible to control the symptoms of these diseases and prevent their progression. A number of measures can be taken to prevent heart disease that may occur in dogs as they age.
In conclusion, the symptoms of heart disease in dogs can vary depending on the disease, its progression, etc. If symptoms such as coughing, weakness, difficulty breathing, respiratory distress, fainting, fatigue, and decreased appetite, which are among the most common symptoms, are encountered, it is essential to consult a veterinarian.

Treatment Methods for Heart Diseases in Dogs
Treatment methods for heart diseases in dogs are determined on a case-by-case basis. While some heart diseases may require surgery, others may necessitate the simultaneous use of one or more medications or monitoring of the disease. Generally, treatments for heart diseases in dogs aim to control the symptoms of heart disease, minimize damage to the heart muscle, control fluid reaching the lungs, accelerate blood circulation, regulate heart rhythm, reduce the risk of blood clots, and increase the amount of oxygen in the blood. When heart diseases in dogs are diagnosed early and the correct treatment methods are applied, it is possible to improve the quality of life of dogs with heart disease.
How to Prevent Heart Diseases in Dogs?
While it is not entirely possible to prevent congenital heart diseases in dogs, it is possible to control the symptoms of these diseases and prevent their progression. A number of measures can be taken to prevent age-related heart diseases in dogs. Cleaning the cat's litter box daily or twice a day is the most effective way to determine if there is a urethral obstruction. If the cat urinates less than normal, it should be closely monitored and a veterinarian should be contacted immediately. Symptoms of urethral obstruction can vary depending on the severity of the obstruction. Symptoms of complete obstruction are quite severe and require prompt action. In cases without complete obstruction, the symptoms are similar to idiopathic cystitis. Frequent urination, digging in the litter box more than usual, licking the genital area much more than usual, and a very small amount of urine in the cat's litter box are considered signs of obstruction.
- Maintaining dogs' weight at an ideal level,
- Providing them with a balanced diet appropriate to their life stages,
- Ensuring they get regular and sufficient exercise,
- Not neglecting routine check-ups with veterinarians,
- Administering parasite vaccinations on time,
- Improving their dental and gum health, and
Taking precautions against health problems they are breed-specifically predisposed to can prevent heart disease in dogs.



