Health
What's the difference between a murmur and heart disease?
A murmur is a sound suggesting something structural. Heart disease describes the actual underlying condition and its stage — the murmur is often just the first clue to it.
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Heart Disease in Brittany Spaniels
Quick answer
What's the difference between a murmur and heart disease?
A murmur is a sound suggesting something structural. Heart disease describes the actual underlying condition and its stage — the murmur is often just the first clue to it.
Your Brittany was diagnosed months ago and nothing seems different. That's normal — and it's also the point where staging matters more than the original diagnosis.
Owners who got a diagnosis and then watched their dog act completely normal for a year or two often struggle to know when to worry again. Owners of working and field-trial Brittanys also wrestle with recalibrating what 'active' means for a dog whose heart is now doing something extra.
Important reminder
This guide is not medical advice. If your dog shows pain, sudden behavior change, or worsening symptoms, consult a licensed veterinarian.
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What this problem looks like
Heart disease in a Brittany rarely announces itself with a dramatic single event. It's a gradual process, usually starting with a structural change picked up on exam or imaging long before the dog shows any symptom at all. Because this breed's documented health list includes heart murmurs, owners are more likely to get an early flag than owners of breeds where cardiac screening is less routine — which is genuinely good news, since early detection is what makes long-term management possible.
Common triggers
- Gradual valve degeneration with age
- Underlying congenital structural variation present since birth
- Missed rechecks that let a stage change go unnoticed
- Excess weight adding unnecessary cardiac workload
- A concurrent condition, like thyroid disease, increasing cardiac demand
Given that heart murmurs already appear on this breed's documented list, some degree of cardiac finding over a Brittany's lifetime isn't unusual, particularly as dogs move into their senior years. Whether a finding ever becomes symptomatic disease varies widely from dog to dog.
Why this happens
Breed factors
Brittanys are built for sustained, high-output field work, and a heart asked to perform at that level for over a decade is more likely to show measurable wear over time than a heart that's rarely pushed. Combined with the breed's documented predisposition to murmurs, this means cardiac changes are worth watching for proactively rather than reactively.
Environment factors
Consistent veterinary care catches stage transitions early, while sporadic care means changes are more likely to be discovered only once symptoms have already appeared. Weight management and steady, moderate conditioning also influence how much reserve capacity the heart has left to draw on.
What you can do at home (once it is not an emergency)
When to talk to your vet
Contact your vet the same day for new coughing, rapid or labored breathing at rest, fainting, pale gums, or reduced appetite alongside lethargy — these can indicate a stage transition toward heart failure.
At home, alongside your vet's plan
- Maintain a lean body condition throughout your Brittany's life, not just after a diagnosis.
- Keep a simple monthly note of resting respiratory rate once any cardiac finding exists, so trends are visible.
- Stick to the recheck schedule your vet sets, even during long stretches when nothing seems different.
- Build exercise gradually after any break rather than resuming full intensity immediately.
- Ask your vet directly what a 'worsening' would look like for your dog's specific stage, so you know your own warning signs.
What actually speeds up progression
None of these cause heart disease outright, but each one removes an early-warning signal or adds unnecessary strain to a heart that's already working with less reserve.
- Stopping rechecks once the dog 'seems fine' — the whole point of staging is catching change before symptoms appear.
- Letting weight creep up because the dog seems less interested in long runs — extra weight adds cardiac workload regardless of appetite for exercise.
- Assuming a stable stage means permanently stable — recheck intervals exist because stages do progress, just usually slowly.
- Skipping prescribed medication once a dog looks and acts normal — many heart medications work precisely because they're keeping the dog looking normal.
- Pushing a diagnosed dog through a full, unmodified hunting season without checking in with the vet first about what's changed.
More Brittany health & behavior issues
- ARVC in Brittanys: Why This Isn't Your Dog's Real Heart Risk
- GDV Surgery in Brittanys: Recovery, Costs & What Comes After
- Intervertebral Disc Disease (IVDD) in Brittany Spani: what to expect
- IVDD Type I in Brittanys: Why It's Uncommon in This Breed
- Kidney Disease in Brittany Spaniels: Signs, Costs and What to Do
- Kidney Stones in Brittany Spaniels: Signs, Costs and What to Do
- Liver Shunts in Brittany Spaniels: Signs, Costs and What to Do
- Pancreatitis & Diabetes in Brittany Spaniels: what to expect
- Pancreatitis in Brittany Spaniels: Signs, Costs and What to Do
- BOAS in Brittany Spaniels: Signs, Costs and What to Do
- BOAS in Brittanys: Why the Structural Syndrome Doesn't Fit
- Gastrointestinal Disorders in Brittany Spaniels: what to expect
- Luxating Patellas in Brittany Spaniels: Signs, Costs and What to Do
- Obesity in Brittany Spaniels: Signs, Costs and What to Do
- Patellar Luxation in Brittany Spaniels: Signs, Costs and What to Do
Heart Disease in other breeds
- German Shepherd Heart Disease: Signs, Lifespan & Treatment
- Maltese Heart Disease: Signs, Lifespan & Treatment
- Poodle Heart Disease: Signs, Lifespan & Treatment
- Rottweiler Heart Disease: Signs, Lifespan & Treatment
- Standard Schnauzer Heart Disease: Signs & Treatment
- Yorkshire Terrier Heart Disease: Signs, Lifespan & Treatment
- Akita Heart Disease in Senior Years: A Progression Guide
- Australian Shepherd Heart Disease: Senior-Year Cardiac Aging
- Bernedoodle Heart Disease: Signs, Lifespan & Treatment
- Bernese Mountain Dog Heart Disease: Stamina, Signs, Care
See all Brittany health problems, which breeds are prone to heart disease, or the full Brittany breed guide for temperament, exercise needs and ownership costs.
What to expect, and how you know it is working
Progression from an early structural finding to symptomatic disease, when it happens at all, often unfolds over several years rather than months. Rechecks every 6 to 12 months are how that timeline gets tracked rather than guessed at.
Success is a dog whose stage stays flat across consecutive rechecks, or one whose progression is caught early enough that medication started before symptoms did. It's rarely about reversing damage — it's about buying stable years.
How vets think about disease stage, not just diagnosis
Veterinary cardiologists commonly describe canine heart disease in stages: a detectable structural abnormality with no enlargement or symptoms, then structural changes with heart enlargement but still no outward signs, then the onset of clinical signs like coughing or exercise intolerance, and finally advanced disease that's difficult to manage even with treatment. A Brittany can sit in an early stage for years. The point of regular rechecks isn't to catch something new every time — it's to catch the transition between stages early, because treatment usually starts before symptoms do, once imaging shows the heart chambers enlarging.
What to do next about heart disease in Brittanys
If you think your Brittany has heart disease, the plan is three steps: write down what you have seen and when it started, book a veterinary appointment rather than waiting for the next flare, and take video of the behaviour or symptom before you go — the thing you are worried about rarely happens in the consulting room. Screening in the parents covers hip dysplasia, elbow dysplasia, progressive retinal atrophy.
What the vet visit should produce is a diagnosis and a written plan, not just reassurance: what is being ruled out, what the monitoring interval is, and which signs mean you come back sooner. Ask what the treatment costs across a year rather than per visit, because that is the number that decides whether you are managing this condition or reacting to it.
Between appointments, keep a short log — dates, what you saw, what changed. It is the single most useful thing an owner brings to a follow-up, and for heart disease it is often what separates a clear pattern from a guess.
Six Years Between Stages
Juniper, a Brittany diagnosed with mild valve thickening at age five, spent the next four years completely unremarkable at home — still hunting, still hiking, still bouncing off the walls at dinnertime. Her owner nearly skipped the sixth-year recheck, since nothing had changed in so long. The echocardiogram that year showed early chamber enlargement, still with no symptoms, and her vet started a low-dose medication meant to slow that specific progression. Juniper is now nine, still active on modified walks instead of all-day hunts, and her next recheck is in four months instead of a year.
Key takeaway: The years with no symptoms are exactly why rechecks matter — that's when a stage change is easiest to catch and act on early.
Frequently asked questions
How long can a Brittany live with diagnosed heart disease?
It depends heavily on the stage at diagnosis and the underlying cause. Dogs caught early, in a pre-symptomatic stage, often live years of normal life before any treatment change is needed at all.
Does heart disease in Brittanys always progress to heart failure?
No. Many dogs are diagnosed with an early structural finding that stays stable for the rest of their life and never reaches the failure stage.
What changes once a Brittany moves to a more advanced stage?
Medication is typically started or adjusted, exercise recommendations get more specific, and recheck frequency usually increases from annual to every few months.
Can diet affect how fast heart disease progresses?
Diet can matter, particularly sodium content once a dog reaches a stage where fluid retention is a concern. Ask your vet before changing food rather than guessing.
Is there a cure for canine heart disease?
Generally no — most cardiac disease in dogs is managed rather than cured. The goal of treatment is to slow progression and maintain quality of life for as long as possible.
How do I know if my Brittany's heart disease is getting worse?
New coughing, faster resting breathing rate, reduced stamina on walks, or fainting are the practical signs to watch between scheduled rechecks.
Quick answers
View more answersHealth
How often does a Brittany with heart disease need vet visits?
Early, stable stages are often rechecked yearly; once symptoms or enlargement appear, every 3 to 6 months is more typical.
Living
Can a Brittany with heart disease still go on walks?
Usually yes at earlier stages, with the intensity and duration set by your vet rather than by how energetic the dog seems.
Costs
Is lifelong medication expensive for heart disease?
Ongoing cardiac medications add a recurring monthly cost, plus periodic rechecks and bloodwork, so it's worth budgeting for once treatment starts.
Behavior
Should I change my Brittany's exercise routine after a heart disease diagnosis?
Only based on your vet's specific guidance for the diagnosed stage — don't restrict or maintain activity based on assumptions alone.
Related DogBreedCompass guides
- what a new heart murmur in a Brittany means – Readers arriving at disease staging often started with a murmur finding.
- mitral valve disease explained – Valve degeneration is the most common structural driver of staged heart disease here.
- Brittany cost of ownership – Owners weighing long-term vet costs benefit from the full cost picture.
- Brittany breed guide – The breed overview gives context for how heart disease fits the wider health profile.
- irregular heartbeat concerns in Brittanys – Rhythm disorders are a separate but related cardiac concern owners often ask about next.
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