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Cardiomyopathy in the dog.

L P Tilley, S K Liu

    Recent Advances in Studies on Cardiac Structure and Metabolism
    |January 1, 1975
    PubMed
    Summary
    This summary is machine-generated.

    Congestive cardiomyopathy is a severe heart condition in large breed dogs, often leading to heart failure with a poor prognosis. Treatment focuses on managing symptoms, but survival is typically limited.

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    Area of Science:

    • Veterinary Cardiology
    • Canine Medicine

    Background:

    • Cardiomyopathy is a significant heart disease in dogs.
    • Congestive cardiomyopathy (CCM) is the most prevalent form, particularly in large breeds.

    Purpose of the Study:

    • To review medical records of dogs diagnosed with cardiomyopathy.
    • To describe the clinical, radiographic, and necropsy findings of CCM in dogs.
    • To evaluate treatment outcomes and prognosis for canine cardiomyopathy.

    Main Methods:

    • Retrospective review of medical records from 17 dogs with cardiomyopathy.
    • Analysis of clinical signs, diagnostic imaging (radiography, electrocardiography), and necropsy findings.
    • Assessment of treatment strategies including medical management and cardioversion.

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    Main Results:

    • Congestive cardiomyopathy affected 15 of 17 dogs, predominantly large breeds aged 2-8 years.
    • Clinical signs included congestive heart failure, with radiographic evidence of cardiac enlargement and pulmonary edema.
    • Necropsy revealed biventricular dilation and poor myocardial contractility; atrial fibrillation was the common arrhythmia.

    Conclusions:

    • Congestive cardiomyopathy in dogs carries a very poor prognosis, with an average survival of 6-12 months post-diagnosis.
    • Hypertrophic cardiomyopathy is rare in dogs, with only two cases exhibiting features similar to human idiopathic hypertrophic subaortic stenosis (IHSS).
    • Effective long-term treatment options for canine congestive cardiomyopathy remain limited.