Enlarged Heart in Dogs: Explanation & Tips from a Vet

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Mild to severe, depending on the underlying condition

Table of Content

Key points

  • Requires diagnosis by a veterinarian.
  • Treatable by a veterinarian.
  • Not transmissible to other animals or humans.
  • Usually a lifelong condition.
  • Prevention is possible for some causes.
  • Diagnosis may require a physical examination, lab tests, x-rays, ECG, and echocardiography. 

Common in:

Symptoms and types:

Dogs with an enlarged heart are at an increased risk of sudden death (a “heart attack”) and so may pass away at home.

Understanding the diagnostics

Blood tests


Ultrasound (echocardiography)

Learning about the causes

Myxomatous Mitral Valve Disease (MMVD)

Dilated Cardiomyopathy (DCM)

Congenital Heart Conditions


There are no effective home remedies to treat heart disease – you must see a veterinarian and follow their advice.

Best treatment options

Pimobendan (Vetmedin®)


ACE inhibitors

Heartworm treatment


Home remedies and their effectiveness

When to see a vet


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