Hypertrophic Cardiomyopathy In Cats Hyperthyroidism

Hypertrophic cardiomyopathy HCM is the most common acquired heart diseases in cats but is rare in dogs. While hyperthyroidism most commonly induces a reversible form of hypertrophic cardiomyopathy a dilative type has also been described and overt congestive cardiac failure can arise form either albeit uncommonly 1719.

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Of these 4 17 also had evidence of cardiac failure pulmonary edema or.

Hypertrophic cardiomyopathy in cats hyperthyroidism. HCM has been more frequently observed in males than females. Cardiomyopathy Hypertrophic HCM Restrictive RCM or Unclassified UCM Less Common Dilated DCM Arrythmogenic Right Ventricular ARVC. Many cats will have slowly progressive disease that ultimately leads to congestive heart failure.

In a 212-year period hypertrophic cardiomyopathy was found at necropsy of 23 cats that died 13 cats or were euthanatized 10 because of problems associated with hyperthyroidism. There is a male predisposition 75. It affects most commonly middle-aged cats average 65 years but all ages are affected.

Hypertrophic cardiomyopathy HCHCM is the most prevalent feline cardiac disorder. In humans there is an important hereditary predisposition for HCM in 55 of cases. The etiology for the majority of cases is unknown.

Hyperthyroidism is common in older cats and is associated with auscultatory abnormalities murmur gallop arrhythmias cardiac remodeling LV hypertrophy or increased cardiac chamber diameters and in some cases CHF or ATE. Most feline cardiomyopathies are primary diseases those whose origins are either genetic or unknown. About 25 of cats with hyperthyroidism become hypertensive.

In some cats blood pressure can become so high that retinal bleeding or retinal detachment will occur resulting in sudden blindness. The secondary form of HCM is usually associated with disease processes such as acromegaly systemic hypertension or hyperthyroidism. 95 - 98 Hyperthyroid cats with severe LV hypertrophy are sometimes seen but this association is suspected to be the result of hyperthyroidism.

Systemic Hypertension SH. In affected cats treatment of the underlying cardiac disease is required together with antithyroid medication. Sometimes heart muscle thickening similar to HCM can develop secondary to other disorders such as hyperthyroidism elevated thyroid hormone and systemic hypertension elevated blood pressure.

Both cardiomyopathy and hypertension are potentially reversible with appropriate treatment of the disease. It is a condition of the thyroid gland in which the gland becomes overactive and produces excessive amounts of its eponymous hormone. Some however are secondary diseases those whose causes are specifically identifiable and include such conditions as anemia hyperthyroidism and high blood pressure.

Hypertrophic cardiomyopathy can progress rapidly in some cats while in others the condition remains relatively static for years. The most common heart disease that adult cats develop is cardiomyopathy usually of the hypertrophic form see handout Cardiomyopathy in Cats. A significant number of cats with HCM will be fine for a while only to develop rear limb paralysis due to ATE.

The valve areas are close together. Hypertrophic cardiomyopathy is defined by left ventricular hypertrophy wo causative systemic or other cardiac disease. The cause of HCM is unknown although certain breeds of cats appear to be predisposed.

Feline Hypertrophic Cardiomyopathy HCM is a condition that causes the muscular walls of a cats heart to thicken decreasing the hearts efficiency and sometimes creating symptoms in other parts of the body. In a 212-year period hypertrophic cardiomyopathy was found at necropsy of 23 cats that died 13 cats or were euthanatized 10 because of problems associated with hyperthyroidism. Bringing cardiology into practice Common Acquired Heart Diseases of Cats.

Hyperthyroidism is a very common in middle-aged and older cats. Middle-aged male cats may be more commonly affected. It is the most common form of heart disease in the cat.

The most common heart disease that adult cats develop is cardiomyopathy Diseases that primarily affect the heart valves and pericardium are rare in adult cats. It is most commonly described in middle-aged cats with a range distribution from 5 months to 17 years. Hyperthyroidism in Cats Hypertrophic cardiomyopathy is the most commonly diagnosed cardiac disease in cats.

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