Care and Feeding of Boston Terriers

9 Key Signs of Mitral Valve Disease Every Boston Terrier Owner Should Know

9 Key Signs of Mitral Valve Disease Every Boston Terrier Owner Should Know

Mitral Valve Disease in Boston Terriers: A Comprehensive Guide for Dog Owners

Unfortunately, Boston Terriers, like many small dog breeds, are predisposed to developing a heart condition called Mitral Valve Disease (MVD) or “Leaky Valve Disease”. As a responsible owner, it’s crucial to understand this condition, its signs, and ways to manage it effectively.

The Age of Onset and Life Expectancy with Mitral Valve Disease

Boston Terriers typically start showing signs of MVD between the ages of 8 and 12 years old. However, it’s important to note that murmurs, a common indicator of the disease, can appear as early as 4 to 6 years of age. While the presence of a murmur doesn’t automatically imply leaky valve disease, it warrants further investigation by a veterinarian.

The prognosis for dogs with leaky valve disease varies depending on the severity of the disease. With early diagnosis and proper management, many Boston Terriers can live happy and fulfilling lives for several years after diagnosis. The average life expectancy for dogs with mild MVD is around 3 to 5 years, while those with advanced stages might have a shorter lifespan. Read more about Boston Terrier heart issues here.

Can Leaky Valve Disease be Prevented?

Unfortunately, there’s no known way to completely prevent MVD in Boston Terriers. However, taking certain proactive measures can help delay its onset and manage its progression:

Maintaining a healthy weight: Excess weight puts undue strain on the heart, worsening leaky valve disease symptoms.
Regular veterinary checkups: These visits allow early detection of heart murmurs and potential intervention before symptoms worsen.
Dental hygiene: Poor dental health can contribute to inflammation throughout the body, including the heart.
Controlled exercise: While regular physical activity is crucial for overall health, avoid overexerting your dog, especially if they show signs of MVD.
Diet: Consult your veterinarian about a heart-healthy diet to support your dog’s cardiovascular health.

Boston Terrier running with stick


What are 9 Symptoms of Mitral Valve Disease in Boston Terriers?

While some dogs with MVD may show no initial symptoms, here are 9 signs to watch out for:

  1. Coughing: This is a common symptom, especially after exercising or eating.

Coughing, particularly after exercise or eating, is one of the most prevalent symptoms of Mitral Valve Disease (MVD) in Boston Terriers. This cough can be dry and hacking, resembling a honking sound, or it might be accompanied by the production of phlegm. It’s important to note that the severity and frequency of coughing can vary significantly between dogs, even those with similar stages of MVD.

The reason behind coughing in leaky valve disease relates to the leakage of blood backward through the mitral valve. This leaky valve allows fluid to accumulate in the lungs, causing irritation and inflammation. This inflamed tissue triggers the cough reflex as a natural response to clear the airways. Additionally, the enlarged heart associated with Mitral Valve Disease can also put pressure on the trachea, further contributing to coughing.

Be mindful that coughing in Boston Terriers is not always indicative of MVD. Other conditions, such as kennel cough or collapsing trachea, can also cause similar symptoms. Therefore, it’s crucial to differentiate between these conditions through proper diagnosis by your veterinarian.

If your Boston Terrier displays any signs of coughing, particularly associated with exercise or eating, promptly schedule an appointment with your veterinarian. Early evaluation and diagnosis of leaky valve disease are crucial for effective management and ensuring a long and healthy life for your furry companion.


2. Exercise intolerance: Your dog may tire easily during walks or playtime.

Exercise intolerance is another prominent symptom of Mitral Valve Disease (MVD) in Boston Terriers. Your once energetic companion may tire easily during walks or playtime, requiring frequent breaks or refusing to participate altogether. This decrease in stamina occurs due to several factors related to leaky valve disease:

  • Reduced blood flow: The leaky mitral valve hinders the heart’s ability to pump blood efficiently, limiting the oxygen and nutrients delivered to muscles. This decrease in oxygenated blood supply leads to fatigue and difficulty exercising.
  • Congestive heart failure: As the disease progresses, fluid buildup in the lungs can occur, making it difficult for your dog to breathe during physical activity.
  • Enlarged heart: The enlarged heart associated with MVD can compress other organs and airways, further impacting their ability to function during exercise.

While exercise restriction is necessary to manage Mitral Valve Disease, completely eliminating physical activity isn’t beneficial. Regular, controlled walks and gentle playtime sessions can help:

  • Maintain muscle mass and strength.
  • Improve lung function.
  • Boost overall well-being.

It’s crucial to pay close attention to your dog’s individual tolerance levels and adjust exercise routines accordingly. If your Boston Terrier shows signs of tiring quickly, such as excessive panting, coughing, or reluctance to move, stop immediately and allow them to rest. Remember, exercise for dogs with MVD should be enjoyable and not strenuous.

By understanding the reasons behind exercise intolerance in leaky valve disease, you can create a safe and enjoyable exercise routine for your beloved Boston Terrier, allowing them to stay active while managing their heart condition effectively.

3. Lethargy: A decrease in energy levels and a reluctance to engage in activities.

A noticeable decrease in energy levels and a reluctance to engage in activities, often referred to as lethargy, can be a subtle yet important sign of Mitral Valve Disease (MVD) in Boston Terriers. This change in behavior might manifest as:

  • Sleeping more than usual.
  • Less interest in playing or going for walks.
  • Seeming less enthusiastic about mealtime.
  • Avoiding interaction with family members or other pets.

While many other factors can contribute to lethargy, it’s crucial to consider leaky valve disease as a potential cause, especially in older Boston Terriers exhibiting other symptoms like coughing or exercise intolerance. The underlying reasons for lethargy in MVD are similar to those behind exercise intolerance:

  • Reduced blood flow: The heart’s inability to pump blood efficiently limits oxygen and nutrients delivered to cells throughout the body, leading to fatigue and lethargy.
  • Fluid buildup: Accumulation of fluid in the lungs or other organs can cause discomfort and contribute to a feeling of tiredness.
  • Pain: In advanced stages of MVD, the enlarged heart can compress other organs, causing pain and impacting overall energy levels.

If you notice your Boston Terrier displaying consistent lethargy, consult your veterinarian for a comprehensive evaluation. Early diagnosis and treatment of leaky valve disease can drastically improve your dog’s energy levels and quality of life. Additionally, consider incorporating small, positive changes to your dog’s daily routine, such as:

  • Providing a comfortable and quiet sleeping space.
  • Offering several small meals throughout the day instead of large ones.
  • Engaging in short, gentle playtime sessions tailored to their energy levels.

Remember, a lethargic Boston Terrier is trying to communicate their discomfort and reduced energy levels. By understanding the possible connection to leaky valve disease and taking proactive measures, you can help your Boston Terrier regain their playful spirit and enjoy a fulfilling life despite their heart condition.


4. Rapid breathing: This can occur at rest or during even mild exertion. Rapid breathing, known as tachypnea, can be a concerning symptom in Boston Terriers with Mitral Valve Disease (MVD). This rapid breathing can occur at rest, even when your dog is seemingly relaxed, or during even mild exertion, like playing fetch or going for a short walk. While dogs naturally pant after exercising or in hot weather, persistent rapid breathing outside these circumstances warrants a visit to your veterinarian.


5. Loss of appetite: A decreased interest in food can be a sign of heart failure.

A sudden decrease in interest in food, also known as anorexia, can be a concerning symptom of Mitral Valve Disease (MVD) in Boston Terriers. This loss of appetite could manifest as:

  • Pickiness with food, refusing once-loved meals.
  • Eating significantly smaller portions than usual.
  • Complete lack of interest in food, leaving their bowl untouched.

While occasional loss of appetite may occur due to minor reasons like stomach upset or stress, consistent anorexia in a Boston Terrier requires immediate attention.


6. Weight gain: This can be caused by fluid buildup in the abdomen.

While weight gain might not be the first symptom that comes to mind when considering Mitral Valve Disease (MVD) in Boston Terriers, it can be a deceiving indicator of the condition. This weight gain often occurs due to fluid buildup in the abdomen, a phenomenon known as ascites.

As leaky valve disease progresses, the leaky mitral valve causes the heart to work harder to pump blood. This strain can lead to fluid leaking into the abdomen, causing bloating and weight gain. While the number on the scale may increase, it’s important to understand that this weight gain doesn’t represent healthy muscle or fat tissue.

Distinguishing between true weight gain and fluid accumulation can be challenging. Here are some signs that suggest the weight gain might be related to Mitral Valve Disease:

  • Sudden and rapid weight gain.
  • Distended abdomen with a tight, filled feeling.
  • Decreased appetite and energy levels.
  • Difficulty breathing and coughing.

If you notice your Boston Terrier experiencing any of these symptoms alongside weight gain, it’s crucial to consult your veterinarian for a proper diagnosis. Early detection and management of leaky valve disease can help control fluid buildup and prevent further complications.

Treatment strategies for MVD-related ascites often include:

  • Medications: Diuretics help remove excess fluid from the body.
  • Dietary modifications: Limiting salt intake can reduce fluid retention.
  • Abdominal fluid tapping: In severe cases, removing fluid from the abdomen with a needle may be necessary.

While weight gain in a Boston Terrier can be a concerning symptom, it’s important to remember that it doesn’t always indicate obesity. Understanding the potential link to MVD and seeking professional guidance can ensure your beloved companion receives the necessary care for optimal well-being and a long, happy life.


7. Difficulty breathing: Your dog may struggle to catch their breath.

Difficulty breathing, also known as dyspnea, is a potentially life-threatening symptom of Mitral Valve Disease (MVD) in Boston Terriers. This difficulty can manifest as noticeable signs such as:

  • Struggling to catch their breath, even at rest.
  • Open-mouthed breathing with a pronounced effort.
  • Wheezing or gasping sounds.
  • Excessive panting after minimal activity or even at rest.
  • Discoloration of the gums, appearing pale or blue.

Several factors contribute to breathing difficulties in MVD:

  • Fluid buildup in the lungs: This fluid accumulation, known as pulmonary edema, restricts the lungs’ ability to expand and contract effectively, leading to labored breathing.
  • Congestive heart failure: As MVD progresses, the heart’s ability to pump blood efficiently diminishes, causing blood to back up in the lungs, further contributing to breathing difficulties.
  • Enlarged heart: The enlarged heart associated with MVD can put pressure on the lungs and airways, restricting their function and making it harder for your dog to breathe.

Ignoring difficulty breathing in a Boston Terrier can be extremely dangerous, as it can lead to respiratory distress and even death. If you notice any signs of labored breathing in your dog, it’s crucial to seek immediate veterinary attention. Early diagnosis and treatment of Mitral Valve Disease can significantly improve your dog’s breathing and prevent further complications.

In addition to veterinary care, you can implement these measures at home to help your dog breathe easier:

  • Maintain a calm and stress-free environment.
  • Elevate your dog’s sleeping area with pillows or a bed to improve lung expansion.
  • Restrict strenuous activity and avoid overheating.
  • Follow your veterinarian’s medication plan diligently.
  • Consider oxygen therapy if recommended by your veterinarian.

Remember, difficulty breathing in a Boston Terrier is a serious symptom that requires prompt attention. By recognizing this sign, seeking emergency veterinary care, and implementing supportive measures at home, you can ensure your Boston receives the necessary care to manage their Mitral Valve Disease and enjoy a longer, healthier life.


8. Pale gums: This can indicate poor circulation.

Pale gums, a noticeable loss of their usual pink coloration, can be a concerning symptom of Mitral Valve Disease (MVD) in Boston Terriers. This pallor indicates poor circulation, which is a direct consequence of the leaky mitral valve.

As the heart struggles to pump blood efficiently due to the leaky valve, less oxygenated blood reaches the body’s tissues, including the gums. This lack of oxygenated blood causes the gums to lose their healthy pink color and appear pale or white. In severe cases, the gums may even appear bluish, indicating a critical lack of oxygen.

Pale gums in a Boston Terrier can be alarming, especially when accompanied by other symptoms like lethargy, coughing, and difficulty breathing. Recognizing this sign and seeking immediate veterinary attention is crucial for early diagnosis and treatment of MVD.

Here are some factors contributing to pale gums in Mitral Valve Disease:

  • Reduced blood flow: The inefficient pumping of the heart limits the delivery of oxygenated blood throughout the body, including the gums.
  • Anemia: In advanced stages of MVD, anemia, a deficiency in red blood cells, can develop, further reducing the oxygen supply to the tissues and contributing to pale gums.
  • Congestive heart failure: As MVD progresses, fluid buildup can occur in various organs, including the lungs. This fluid accumulation impacts the heart’s ability to pump blood effectively, leading to poor circulation and pale gums.

By understanding the link between pale gums and MVD in Boston Terriers, you can ensure your dog receives prompt and appropriate treatment. Early intervention can improve circulation, restore healthy gum color, and significantly improve your dog’s quality of life.

Remember, while pale gums can be a sign of MVD, it’s important to note that other factors like stress, anemia, or dehydration can also contribute to this symptom. Therefore, always consult your veterinarian for a comprehensive evaluation to determine the underlying cause and receive the best possible care for your beloved Boston Terrier.


9. Fainting: This can be a serious symptom and requires immediate veterinary attention.

Fainting, also known as syncope, is a serious and potentially life-threatening symptom of Mitral Valve Disease (MVD) in Boston Terriers. It occurs when the brain is momentarily deprived of oxygenated blood, causing sudden loss of consciousness and collapse.

Several factors contribute to fainting in leaky valve disease :

  • Cardiac arrhythmias: The leaky mitral valve can cause irregular heartbeats, which can lead to a sudden drop in blood pressure and subsequent fainting.
  • Low blood pressure: The weakened heart muscle associated with MVD can struggle to pump blood effectively, resulting in low blood pressure and fainting episodes.
  • Carotid sinus hypersensitivity: This condition, common in older dogs, makes them susceptible to fainting when pressure is applied to the carotid arteries in the neck. This can occur during coughing, straining, or even when wearing a collar.

Fainting in a Boston Terrier is a medical emergency that requires immediate veterinary attention. Ignoring this symptom can have life-threatening consequences.

Here are some signs to watch for that may precede fainting:

  • Weakness and dizziness.
  • Stumbling or staggering.
  • Pale gums.
  • Rapid breathing.
  • Coughing.

If you witness your Boston Terrier fainting, it’s crucial to take the following steps:

  • Gently move your dog to a safe and cool place.
  • Elevate their head and neck.
  • Loosen any collars or tight clothing.
  • Avoid giving your dog any food or water.
  • Seek immediate veterinary attention.

Early diagnosis and treatment of leaky valve disease can significantly reduce the risk of fainting episodes and improve your dog’s quality of life. Treatment strategies may include medication, dietary modifications, and, in some cases, surgery.

Remember, fainting in a Boston Terrier is not a symptom to be ignored. By recognizing this serious sign, seeking immediate veterinary care, and implementing appropriate treatment plans, you can ensure your furry friend receives the necessary support to manage their leaky valve disease and live a happy life for years to come.

If you notice any of these symptoms in your Boston Terrier, it’s crucial to schedule an appointment with your veterinarian for a comprehensive evaluation. Early diagnosis and treatment can significantly improve your dog’s quality of life and lifespan.

Boston Terrier running with toy

Diet and Special Care for Boston Terriers with Mitral Valve Disease


Diet plays a vital role in managing MVD. Your veterinarian can recommend a heart-healthy diet specifically formulated for dogs with this condition. This diet might be low in sodium and fat to reduce strain on the heart. Additionally, it’s important to monitor your dog’s water intake and ensure they have access to fresh water at all times.

Here are some additional care tips for Boston Terriers with leaky valve disease :

Limit strenuous exercise: Opt for gentle walks and short playtime sessions.

Avoid stress: Stress can exacerbate MVD symptoms. Provide a calm and supportive environment for your dog.

Maintain a regular medication schedule: Adhere to your veterinarian’s prescribed medication schedule to manage the disease effectively.


Schedule regular checkups: Monitoring the progression of MVD through regular veterinary exams is crucial for adjusting treatment plans if necessary.


By understanding the signs and symptoms of MVD, implementing preventative measures, and providing proper care, you can give your beloved Boston Terrier the best possible chance of living a happy and healthy life with this condition. Remember, early detection and proactive management are key to maximizing your dog’s quality of life and lifespan.

Boston Terrier Bummy

https://hospital.cvm.ncsu.edu/services/small-animals/cardiology/degenerative-mitral-valve-disease-in-dogs/

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