Cardiac Screening Guidelines for Cavalier King Charles Spaniels
Heart disease is the most significant inherited health concern affecting the Cavalier King Charles Spaniel. Because the breed has a high prevalence of myxomatous mitral valve disease (MMVD), regular cardiac screening plays an essential role in both individual dog health and responsible breeding programs.
Cardiac screening enables veterinarians to detect heart disease before clinical signs develop, monitor changes over time and assist breeders in making informed breeding decisions. While no screening program can completely eliminate inherited disease, consistent cardiac testing is one of the most effective tools available for improving the long-term health of the breed.
This guide explains what cardiac screening involves, who should be screened, and why these examinations are so important.
What Is Cardiac Screening?
Cardiac screening is a systematic assessment of a dog's heart health performed by a veterinarian.
The purpose is to identify:
Heart murmurs
Abnormal heart rhythms
Evidence of valve disease
Structural heart abnormalities
Progression of existing heart disease
Most screening begins with a thorough physical examination, with additional diagnostic testing recommended when appropriate.
Why Is Cardiac Screening Important?
Mitral valve disease develops gradually. Many affected Cavaliers appear perfectly healthy during the early stages, with no obvious symptoms noticed by owners.
Routine cardiac screening allows veterinarians to:
Detect heart murmurs early
Monitor disease progression
Determine when additional testing is needed
Guide treatment decisions
Assist breeders with evidence-based breeding choices
Early detection provides the best opportunity for appropriate monitoring and management throughout a dog's life.
Who Should Have Cardiac Screening?
Companion Cavaliers:
Every Cavalier King Charles Spaniel should receive a comprehensive veterinary examination at least annually, including careful assessment of the heart. Older dogs and those already diagnosed with heart disease may require more frequent examinations.
Breeding Dogs:
Breeding Cavaliers should undergo regular cardiac examinations as part of a responsible breeding program. Many breed clubs around the world recommend that breeding dogs receive heart examinations performed by appropriately qualified veterinarians or veterinary cardiologists before breeding and at regular intervals throughout their breeding lives.
Because recommendations vary between countries and kennel organisations, breeders should also follow the health protocols established by their national breed club and canine controlling body.
What Happens During Cardiac Screening?
A cardiac examination is painless and non-invasive.
Your veterinarian will generally:
Listen carefully to the heart using a stethoscope
Assess heart rate and rhythm
Check for heart murmurs
Evaluate pulse quality
Examine breathing and respiratory effort
Assess your dog's overall physical condition
If any abnormalities are detected, further investigations may be recommended.
Additional Cardiac Tests
Depending on your dog's age, clinical signs and examination findings, additional diagnostic tests may include:
Echocardiography: An echocardiogram (heart ultrasound) provides detailed images of the heart chambers, valves and blood flow. It is considered the gold standard for diagnosing and monitoring mitral valve disease.
Chest Radiographs: Chest X-rays help determine whether the heart has enlarged or whether fluid has accumulated in the lungs.
Electrocardiogram (ECG): An ECG evaluates the heart's electrical activity and can identify abnormal heart rhythms.
Blood Pressure Measurement: Blood pressure monitoring may provide additional information about cardiovascular health and help guide treatment decisions.
The Importance of Veterinary Cardiologists
While many general practice veterinarians are highly experienced in detecting heart murmurs, veterinary cardiologists have advanced training in diagnosing and managing heart disease.
Referral to a cardiologist may be recommended when:
A heart murmur is first detected
Breeding certification is required
Echocardiography is recommended
Complex heart disease is suspected
Treatment decisions require specialist input
Cardiac Screening and Responsible Breeding
Cardiac screening is one component of a comprehensive health testing program.
Responsible breeders use the results alongside other health assessments to make informed breeding decisions that aim to reduce the prevalence of inherited disease within the breed.
No single health test guarantees healthy offspring, but consistent participation in recognised screening programs supports the long-term welfare of Cavalier King Charles Spaniels.
Screening Throughout Life
Heart disease can develop at any stage of adulthood. For this reason, cardiac screening should not be viewed as a one-time examination.
Regular assessments throughout a dog's life allow veterinarians to identify changes early and monitor progression if disease develops.
Frequently Asked Questions
What is cardiac screening?
Cardiac screening is a veterinary examination designed to assess heart health, detect heart murmurs and identify signs of heart disease before clinical symptoms develop.
At what age should Cavaliers begin cardiac screening?
Heart assessment should form part of every routine veterinary examination throughout a Cavalier's life. Adult dogs should receive at least an annual cardiac examination, with more frequent monitoring recommended if heart disease is present.
Is a heart murmur the same as heart disease?
Not necessarily. A heart murmur is an abnormal sound created by turbulent blood flow within the heart. While it is commonly associated with mitral valve disease, additional testing may be needed to determine the underlying cause.
Does every breeding Cavalier need cardiac screening?
Yes. Regular heart examinations are considered an important part of responsible breeding and help breeders make informed decisions that support the long-term health of the breed.
Can cardiac screening prevent heart disease?
No. Screening cannot prevent inherited heart disease, but it allows earlier detection, better monitoring and more informed management of affected dogs.
In conclusion…
Every Cavalier should have their heart assessed during routine veterinary examinations.
Annual cardiac examinations are recommended for healthy adult Cavaliers.
Breeding dogs should participate in recognised cardiac screening programs.
Early detection allows better monitoring and management.
Cardiac screening is an important part of responsible breeding and lifelong health care.
Related Articles
Responsible Breeding
Understanding Resting Respiratory Rate (RRR)
References
Keene BW, Atkins CE, Bonagura JD, et al. ACVIM Consensus Guidelines for the Diagnosis and Treatment of Myxomatous Mitral Valve Disease in Dogs. Journal of Veterinary Internal Medicine. 2019.
American College of Veterinary Internal Medicine. Consensus guidelines on canine myxomatous mitral valve disease.
European Society of Veterinary Cardiology. Clinical guidance on canine cardiovascular disease.
The Kennel Club. Health testing guidance for breeders.
WSAVA. Global guidelines for companion animal healthcare.
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.