Heart disease is the single most significant health concern affecting the Cavalier King Charles Spaniel. While advances in veterinary medicine have improved treatment options, early detection remains one of the most important factors in helping affected dogs live longer, healthier and more comfortable lives.

Many Cavaliers show no outward signs of heart disease in its earliest stages. In fact, a dog may appear completely healthy while subtle changes are already occurring within the heart. This is why regular veterinary heart examinations are so important.

Whether your Cavalier is a much-loved family companion or a breeding dog, annual heart checks provide valuable information about your dog's heart health and allow any changes to be detected as early as possible.

Why Are Annual Heart Checks Important?

The most common heart condition affecting Cavaliers is myxomatous mitral valve disease (MMVD), a progressive disease affecting the mitral valve.

Although the disease cannot currently be prevented or cured, early diagnosis allows your veterinarian to:

• Monitor disease progression

• Recommend additional diagnostic testing when appropriate

• Begin treatment at the most beneficial time

• Provide advice on exercise, weight management and lifestyle

• Monitor your dog's quality of life

Detecting heart disease before clinical signs develop gives both owners and veterinarians the greatest opportunity to manage the condition effectively.

Heart Disease Often Has No Early Symptoms

One of the challenges with heart disease is that many dogs appear perfectly healthy during the early stages.

Your Cavalier may continue to:

• Eat normally

• Enjoy walks

• Play with the family

• Sleep comfortably

• Show no obvious signs of illness

The first indication is often a heart murmur, detected during a routine veterinary examination long before any symptoms become noticeable at home. This makes regular heart checks an essential part of preventative healthcare.

What Happens During a Heart Check?

A routine cardiac examination is quick, painless and non-invasive.

Your veterinarian will typically:

• Listen carefully to your dog's heart using a stethoscope (auscultation)

• Assess heart rate and rhythm

• Listen for heart murmurs

• Evaluate pulse quality

• Check your dog's breathing

• Assess overall health and body condition

If any abnormalities are detected, further investigations may be recommended.

When Is Additional Testing Recommended?

If your veterinarian identifies a heart murmur or suspects heart disease, they may recommend further testing, including:

Echocardiography (Heart Ultrasound): An echocardiogram is considered the gold standard for assessing heart structure and function. It allows a veterinary cardiologist or experienced veterinarian to visualise the heart in real time.

Chest X-rays: Radiographs help determine whether the heart has enlarged and whether fluid has accumulated in the lungs.

Electrocardiogram (ECG): An ECG evaluates the heart's electrical activity and can detect abnormal heart rhythms.

Blood Pressure Measurement: Blood pressure assessment provides additional information about cardiovascular health and may assist with treatment decisions.

When Should Heart Checks Begin?

Because Cavaliers have a genetic predisposition to MMVD, regular heart examinations should begin from an early age as part of routine veterinary care. For adult Cavaliers, an annual veterinary examination that includes a thorough cardiac assessment is recommended.

For breeding dogs, many breed clubs around the world recommend or require formal heart examinations performed by appropriately qualified veterinarians or veterinary cardiologists as part of responsible breeding programs.

Always follow the recommendations of your veterinarian and your local breed club regarding cardiac screening.

Heart Checks for Breeding Dogs

Responsible breeding plays a vital role in improving the long-term health of the breed. Regular heart examinations help breeders make informed breeding decisions by identifying dogs that remain free from clinically detectable heart disease.

Many Cavalier breed clubs encourage participation in established heart screening programs as part of their commitment to preserving the breed's health.

What Should Owners Watch for at Home?

Between veterinary visits, owners should remain alert for changes that may indicate heart disease is progressing.

Contact your veterinarian if your Cavalier develops:

• Persistent coughing

• Faster breathing while resting

• Difficulty breathing

• Reduced exercise tolerance

• Lethargy

• Fainting or collapse

• Reduced appetite

• Swollen abdomen

Monitoring your dog's Resting Respiratory Rate (RRR) at home can also help identify changes early.

Early Detection Saves Lives

Although annual heart checks cannot prevent heart disease, they can identify changes before serious complications develop.

Earlier diagnosis often means:

• Better monitoring

• Earlier intervention when appropriate

• Improved quality of life

• More informed treatment decisions

• Greater peace of mind for owners

For a breed predisposed to heart disease, regular cardiac examinations are one of the most valuable investments you can make in your Cavalier's long-term health.

Frequently Asked Questions

How often should my Cavalier have a heart check?

Every Cavalier should receive a thorough veterinary examination at least once a year, including careful assessment of the heart. Older dogs or those with diagnosed heart disease may require more frequent examinations as recommended by your veterinarian.

What age should heart checks begin?

Heart assessments should form part of every routine veterinary examination throughout your Cavalier's life. Because the breed has an increased risk of developing MMVD, regular monitoring from an early age is important.

Does a heart murmur always mean heart failure?

No. A heart murmur simply indicates turbulent blood flow within the heart. Many dogs with heart murmurs continue to live comfortably for years before developing signs of heart failure, while some may never progress to that stage.

Should breeding Cavaliers have specialised heart examinations?

Yes. Responsible breeding programs commonly include formal cardiac examinations performed by appropriately qualified veterinarians or veterinary cardiologists to help reduce the incidence of inherited heart disease within the breed.

Can heart disease be detected before symptoms appear?

Yes. Heart murmurs and other early changes are often detected during routine veterinary examinations long before owners notice any symptoms at home.

Related Articles

• Heart Murmurs Explained

• Mitral Valve Disease (MMVD)

• Caring for a Cavalier with Heart Disease

References

1. Keene BW, et al. ACVIM Consensus Guidelines for the Diagnosis and Treatment of Myxomatous Mitral Valve Disease in Dogs.Journal of Veterinary Internal Medicine. 2019.

2. American College of Veterinary Internal Medicine. Consensus guidelines for canine myxomatous mitral valve disease.

3. European Society of Veterinary Cardiology. Clinical guidance on canine cardiovascular disease.

4. WSAVA. Global recommendations for companion animal health care.

Disclaimer

The information provided in the Cavalier Knowledge Centre is intended for general educational purposes only and is not a substitute for veterinary advice, diagnosis or treatment.