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Cardiomyopathy

Cardiomyopathy is disease of the heart muscle. In cats, hypertrophic cardiomyopathy (HCM) is the most common form. In dogs, dilated cardiomyopathy (DCM) is most prevalent in large breeds.

Key Facts

  • HCM (cats): thickening of heart walls; most common feline heart disease; often genetic
  • DCM (dogs): weakened, dilated heart chambers; large/giant breeds predisposed (Doberman, Great Dane, Boxer)
  • HCM cats may be asymptomatic or present with sudden paralysis from aortic-thromboembolism
  • DCM linked to taurine deficiency in cats and potentially grain-free diets in dogs
  • Signs: lethargy, rapid breathing, dyspnea, pleural-effusion, exercise intolerance
  • Diagnosis: echocardiogram (heart ultrasound)
  • Treatment: ACE inhibitors, diuretics (furosemide), beta-blockers, blood thinners for cats
  • Cats with HCM: sleeping/resting respiratory rate monitoring is crucial for early detection of heart failure
  • Species: dogs and cats

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