Heart Disease in Newfoundlands
Newfoundlands are predisposed to dilated cardiomyopathy (DCM), where the heart muscle weakens and the chambers enlarge, reducing pumping efficiency. This is the most significant health concern for the breed. Annual cardiac screening starting at age 2-3 is strongly recommended for all Newfoundlands.
Prevalence
Common — one of the leading health concerns in the breed
Typical Onset
4-8 years
Severity
Severe
Symptoms to Watch For
If your Newfoundland shows any of these signs, monitor closely and consult your veterinarian.
Risk Factors
- •breed predisposition to dilated cardiomyopathy
- •obesity increasing cardiac workload
- •taurine/carnitine deficiency (check levels)
- •grain-free diets linked to nutritional DCM
- •lack of cardiac screening before breeding
Diagnosis
Auscultation detects murmurs and arrhythmias. Chest radiographs reveal heart enlargement and pulmonary edema. Echocardiogram (cardiac ultrasound) is the gold standard — shows chamber size, valve function, and contractility. ECG detects arrhythmias. NT-proBNP blood test screens for heart disease before symptoms appear.
Treatment
Varies by disease type. MVD: pimobendan + ACE inhibitor + furosemide when symptomatic. DCM: pimobendan, ACE inhibitors, anti-arrhythmics, taurine/carnitine supplementation. Sodium-restricted diet. Activity restriction in advanced stages. Regular monitoring with echocardiograms to track progression.
Prevention
Breed-specific cardiac screening before breeding. Annual cardiac auscultation by a veterinarian. Echocardiogram screening for high-risk breeds starting at age 2-3. Taurine and L-carnitine supplementation may help in DCM-prone breeds. Avoid grain-free diets linked to nutritional DCM.
When to See a Vet
See your vet if your pet develops a persistent cough, tires easily during walks, breathes faster than normal at rest, or faints. Heart disease is progressive — early medication significantly extends quality of life.
Other Health Conditions in Newfoundlands
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