Dilated cardiomyopathy (DCM) in dogs
In DCM, the heart muscle weakens and the chambers stretch, so the heart pumps poorly. It's most common in large breeds like Dobermans and Great Danes.
Last updated: October 2026 · 2 sources · see sources
Signs to watch for
- Low energy
- Coughing
- Fast breathing
- Fainting
- Swollen belly
- Sometimes sudden collapse
Trouble breathing, collapse, repeated vomiting, not peeing, or a seizure that lasts more than a few minutes needs a vet right away. See when to see a vet.
How vets diagnose it
Diagnosis relies on an echocardiogram. An ECG or Holter monitor checks for abnormal rhythms, and chest X-rays look for fluid. [2]
How it's treated
Treatment usually includes pimobendan, diuretics and other heart or rhythm medicines. Your vet may ask about diet, since some DCM cases have been linked to certain diets. [2]
Medicines your vet may mention: Vetmedin (Pimobendan), Furosemide (Lasix), Enalapril. We don't list doses; your vet will decide what fits your pet.
What it costs to diagnose and manage
| Item | Typical US price | Src |
|---|---|---|
| Diagnosis (exam and tests) | $500–$1,200 | [1] |
| Ongoing treatment, per month | $50–$300 | [1] |
| Ongoing treatment over a year (monthly range × 12) | $600–$3,600 | [1] |
These are typical US ranges from the sources listed. Your pet's costs depend on how severe things are, the tests your vet recommends, your pet's size and where you live. Ask your vet for a written estimate.
Outlook
Outlook varies. Early screening in at-risk breeds can help start treatment sooner. [2]
Common questions
What is dilated cardiomyopathy (DCM) in dogs?
In DCM, the heart muscle weakens and the chambers stretch, so the heart pumps poorly. It's most common in large breeds like Dobermans and Great Danes.
What are the signs of dilated cardiomyopathy (DCM)?
Common signs include: low energy, coughing, fast breathing, fainting, swollen belly, sometimes sudden collapse.
How do vets diagnose dilated cardiomyopathy (DCM)?
Diagnosis relies on an echocardiogram. An ECG or Holter monitor checks for abnormal rhythms, and chest X-rays look for fluid.
How is dilated cardiomyopathy (DCM) treated?
Treatment usually includes pimobendan, diuretics and other heart or rhythm medicines. Your vet may ask about diet, since some DCM cases have been linked to certain diets.
How much does dilated cardiomyopathy (DCM) cost to treat?
Diagnosis (exam and tests): $500–$1,200; Ongoing treatment, per month: $50–$300; Ongoing treatment over a year (monthly range × 12): $600–$3,600. Costs vary with severity, tests, your pet's size and where you live.
Related
This page is general information for pet owners, not veterinary advice. Talk to your vet about your own pet.