A heart murmur is an abnormal sound during heartbeat - diagnosis costs $500-$2,000, medication $50-$200/month. Not all murmurs mean disease. Puppies often outgrow innocent murmurs. In adults, murmurs are graded I-VI and may signal valve disease, cardiomyopathy, or other conditions. Here's what diagnosis and treatment actually costs.
What Causes Heart Murmurs
Turbulent blood flow heard with a stethoscope. Common causes: mitral valve disease (small breeds), dilated cardiomyopathy, congenital defects, heartworm. Innocent puppy murmurs usually disappear by 4-5 months.
Graded I-VI by intensity
Symptoms What to Watch For
Low-grade murmurs often cause no symptoms. As heart disease progresses: coughing (night), exercise intolerance, rapid breathing, fainting, swollen belly, bluish gums.
Low-grade murmurs may have no visible symptoms
Diagnosis $500-$2,000
Vet exam ($50-$100) detects murmur. Echocardiogram ($300-$600) is key-an ultrasound of heart structure. Chest X-rays ($200-$400), blood work ($100-$300), ECG ($100-$250).
Average $500-$2,000
Treatment $50-$200/Month Ongoing
Innocent puppy murmurs need no treatment. For heart disease: ACE inhibitors, furosemide, pimobendan-$50-$200/month. Severe cases need specialist visits every 3-6 months. Surgery: $5,000-$20,000.
Average $50-$200/month medication
Total Cost $500-$2,000+ Diagnosis
Initial workup plus ongoing meds. Annual monitoring adds $300-$600/year. Surgery cases reach $5,000-$20,000.
Small Breeds Higher Risk
Cavalier King Charles Spaniels, Dachshunds, Chihuahuas, and Miniature Poodles are most prone to mitral valve disease.
Prognosis Varies Widely
Innocent murmurs resolve on their own. Managed valve disease dogs can live years with medication. Prognosis depends on the cause.
Prevention
Regular vet checkups to catch murmurs early. Heartworm prevention. Maintain healthy weight. Annual exams are key.
The Real Cost
$500typical cost
Initial workup plus ongoing meds.
Diagnosis $500-$2,000
Treatment $50-$200/Month
Total Cost $500-$2,000
Red flags
Insurance Traps
Cardiac conditions are expensive long-term - here's how insurance handles heart murmurs and heart disease.
Cardiac Coverage Basics Waiting period
Most pet insurance covers heart conditions (echocardiograms, medications, specialists) unless detected before enrollment. Echocardiograms are expensive-insurance provides real value. Standard 14-day illness waiting period applies to cardiac claims.
The Pre-Existing Murmur Problem Pre-existing
If a murmur was noted before your policy started, all heart claims likely denied as pre-existing. A major issue with breeds predisposed to heart disease. Insure young, healthy dogs early.
Ongoing Medication Coverage Chronic condition
Heart meds cost $50-$200/month-$600-$2,400 yearly for life. Most plans cover medications but check for per-condition caps limiting long-term cardiac coverage. Some cover meds but not recurring specialist echocardiograms.
Breed-Specific Exclusions Exclusion
Some insurers add breed-specific exclusions for conditions affecting certain breeds. Cavalier King Charles Spaniels may face cardiac exclusions or higher premiums.
Common Questions
Real answers about costs, treatment, and insurance coverage.
What is a heart murmur in dogs?
An abnormal whooshing sound from turbulent blood flow. Murmurs aren't disease-they signal something else, from harmless (innocent puppy murmurs) to serious (valve degeneration, cardiomyopathy).
How are heart murmurs graded in dogs?
Graded I-VI by loudness. Grade I barely audible. Grades II-III soft to moderate. Grades IV-V loud with chest vibration. Grade VI loudest. Higher grade doesn't always mean worse disease but warrants investigation.
Do puppies outgrow heart murmurs?
Many do. Innocent murmurs (Grade I-II) often disappear by 4-5 months. Congenital defects cause murmurs that won't resolve. Your vet should monitor at each puppy visit.
How much does an echocardiogram cost for a dog?
Echocardiogram costs $300-$600 at general practice, $400-$800 at cardiology specialist. Shows chamber size, valve function, blood flow, muscle thickness. Sedation adds $50-$100.
What medications are used for heart disease in dogs?
Common: pimobendan (strengthens contractions), furosemide (removes fluid), enalapril/benazepril (ACE inhibitors), spironolactone. Combination depends on disease type and severity. Monthly costs $50-$200.
Can a dog live a normal life with a heart murmur?
Many do-especially with innocent or low-grade murmurs. With medication, heart disease dogs maintain good quality of life for years. Key: early detection, consistent medication, regular echocardiogram monitoring.
What are the signs of heart failure in dogs?
Persistent coughing (night), rapid breathing at rest, extreme exercise reluctance, fainting, swollen abdomen, bluish gums, weight loss. See your vet urgently-heart failure needs immediate treatment adjustment.
Does pet insurance cover heart murmur treatment?
Most policies cover diagnosis and treatment as standard illness coverage. Catch: murmurs detected before enrollment denied as pre-existing. Long-term medication coverage varies-some plans have annual or per-condition caps.
My mother-in-law's boxer. Problem. $1,200 in tests, no answers. Another vet solved it with $8 pills. When you're scared, you'll pay anything - and some vets price accordingly. So I built what I couldn't find: real costs, real exclusions, plain language. Not selling policies.
Sources
Research and data used to compile this profile.
- 1 Keene BW, Atkins CE, Bonagura JD, et al. ACVIM consensus guidelines for the diagnosis and treatment of myxomatous mitral valve disease in dogs. J Vet Intern Med. 2019;33(3):1127-40.
- 2 Pedersen HD, Häggström J, Falk T, et al. Auscultation in mild mitral regurgitation in dogs: observer variation, effect of physical maneuvers, and agreement with color Doppler echocardiography and phonocardiography. J Vet Intern Med. 1999;13(1):56-64.