In many cases of MMVD (myxomatous mitral valve disease, the most common acquired heart problem seen in dogs), our vets can detect tell-tale abnormal heart sounds, known as heart murmurs, early in the course of the disease. This means that the patient can then be monitored for the development of any symptoms.

However, in some cases, affected dogs may present unwell with heart disease symptoms despite no known prior history of heart problems.

Here’s how we can help.

What is MMVD?

MMVD involves progressive degeneration of the mitral valve within the heart. This causes turbulent blood flow and a gradual loss of effective heart pumping function, which can lead to symptoms such as:

• Breathing difficulties or coughing due to fluid build-up in the lungs
• Fainting episodes due to inadequate blood flow around the body
• A swollen tummy due to fluid build-up in the abdomen

MMVD most commonly affects Cavalier King Charles Spaniels, but is also often seen in other middle-aged to older small breed dogs such as Chihuahuas, Cocker Spaniels, and Poodles.

From the time a heart murmur develops, it can be months to several years until the pet progresses to having symptoms of heart disease.

How can we help?

If we diagnose a heart murmur suggestive of MMVD in your pet, we will advise you on how to monitor your pet at home, and when they will be recommended to have rechecks or undergo further investigation (such as chest X-rays to check their heart size).

If your pet presents with symptoms of heart-related unwellness, we will ideally confirm their diagnosis with chest X-rays (and in some cases, referral to a specialist for a heart ultrasound), before discussing treatment options with you. The good news is that there are medications that will help to manage your pet’s symptoms and improve their quality of life.

For more information on canine MMVD, consult our caring veterinary team.