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Category:Cardiomyopathy (view source)

Revision as of 14:15, 23 June 2010

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===Hypertrophic cardiomyopathy===
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===[[Hypertrophic ardiomyopathy===
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[[Image:hypertrophic cardiomyopathy.jpg|right|thumb|125px|<small><center>'''Hypertrophic cardiomyopathy (cat)'''. Courtesy of T. Scase</center></small>]]
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''Incidence:''
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The cat is most commonly affected.
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There is some evidence of inheritance, as in man, and the disease is said to be more common in male cats.  There is a wide age range of 7 months to 24 years.
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Inherited in Maine Coon cats.
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''Clinical signs:''
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Grossly there is disproportionate hypertrophy of the left ventricle and often the interventricular septum.  The chamber size is dramatically reduced. 
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Histologically there is haphazard hypertrophy of the myocardial fibres. 
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The reduction in left ventricular volume and the stiffened ventricular wall results in diastolic dysfunction, the stroke volume is reduced resulting in congestive heart failure and the following clinical signs:
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[[Image:hypertrophic cardiomyopathy 2.jpg|right|thumb|125px|<small><center>'''Hypertrophic cardiomyopathy (cat)'''. Courtesy of T. Scase</center></small>]]
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*Tachycardia.
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*Arrhythmia (abnormal myocardium)
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*Dyspnoea.
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The force of the left ventricular contraction reduces afterload and reduces end-systolic volume to zero in some cases.  This is '''cavity obliteration'''. 
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*[[Atrial_Thrombosis|Thromboembolic disease]] is a frequent complication.  The thromboemboli most often impact in the femoral arteries manifesting as an acute hindlimb paralysis.
      
===[[Restrictive Cardiomyopathy]]===
 
===[[Restrictive Cardiomyopathy]]===
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