Heart disease in pets can sound alarming—and for good reason. One of the most common cardiac conditions, especially in dogs, is Mitral Valve Disease (MVD). The good news? With early detection and proper management, many pets with this condition can continue to live happy, comfortable lives.
Let’s break down what MVD is, how it affects pets, and what you can do about it.
What Is Mitral Valve Disease?
The mitral valve sits between the left atrium and left ventricle of the heart. Its job is to keep blood flowing in the correct direction. In Mitral Valve Disease, this valve becomes thickened and leaky, allowing blood to flow backward instead of forward.
This condition is also known as:
- Degenerative mitral valve disease (DMVD)
- Mitral regurgitation
Over time, this backflow can lead to heart enlargement and eventually congestive heart failure (CHF).
How Common Is It?
Mitral Valve Disease is:
- The most common heart disease in dogs, especially small breeds
- More frequently seen in older dogs
- Common in breeds like Cavalier King Charles Spaniels, Dachshunds, Chihuahuas, and Poodles
What About Cats?
Cats can develop mitral valve disease, but it’s much less common. In cats, heart disease is more often related to cardiomyopathy (a disease of the heart muscle), rather than valve issues.
Signs and Symptoms to Watch For
MVD often develops slowly, and early stages may show no symptoms. As the disease progresses, you may notice:
- Persistent coughing
- Fatigue or reduced activity
- Difficulty breathing or rapid breathing
- Exercise intolerance
- Decreased appetite
- In severe cases, fainting or collapse
If your pet shows any of these signs, it’s important to consult your veterinarian promptly.
How Is It Diagnosed?
Veterinarians often detect MVD during routine exams when they hear a heart murmur with a stethoscope.
Further testing may include:
- Chest X-rays to check heart size and lungs
- Echocardiogram (ultrasound of the heart) for a detailed diagnosis
- Blood pressure measurement
- Blood tests to assess overall health
Early diagnosis is key to slowing disease progression.
Treatment and Management
While Mitral Valve Disease cannot be cured, it can often be managed effectively.
Treatment depends on the stage of the disease and may include:
- Medications to reduce fluid buildup and improve heart function
- ACE inhibitors to support circulation
- Diuretics if fluid is present in the lungs
- Special diets or sodium restriction
Regular monitoring is essential, as treatment plans may need adjustment over time.
What Is the Prognosis?
Many dogs with early-stage MVD live for years without symptoms. Even in more advanced stages, modern treatments can significantly improve quality of life.
Cats with valve disease tend to be more complex cases, and prognosis varies depending on the underlying condition.
Can Mitral Valve Disease Be Prevented?
There’s no guaranteed way to prevent MVD, especially since it’s often age- or breed-related. However, you can support your pet’s heart health by:
- Scheduling regular veterinary check-ups
- Maintaining a healthy weight
- Following your vet’s recommendations for monitoring and care
- Starting treatment early if a murmur is detected
Mitral Valve Disease may be common, but it doesn’t have to be devastating. Awareness, early detection, and consistent care can make a meaningful difference in your pet’s life.
If your dog is getting older or belongs to a higher-risk breed, talk to your veterinarian about heart screenings. And if you ever notice changes in breathing, energy, or coughing—don’t wait. Early action is the best protection.