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-Poor for symptomatic cats
-Poor for symptomatic cats
==From Pathology==
[[Image:hypertrophic cardiomyopathy.jpg|right|thumb|125px|<small><center>'''Hypertrophic cardiomyopathy (cat)'''. Courtesy of T. Scase</center></small>]]
''Incidence:''
The cat is most commonly affected.
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.
Inherited in Maine Coon cats.
''Clinical signs:''
Grossly there is disproportionate hypertrophy of the left ventricle and often the interventricular septum. The chamber size is dramatically reduced.
Histologically there is haphazard hypertrophy of the myocardial fibres.
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:
[[Image:hypertrophic cardiomyopathy 2.jpg|right|thumb|125px|<small><center>'''Hypertrophic cardiomyopathy (cat)'''. Courtesy of T. Scase</center></small>]]
*Tachycardia.
*Arrhythmia (abnormal myocardium)
*Dyspnoea.
The force of the left ventricular contraction reduces afterload and reduces end-systolic volume to zero in some cases. This is '''cavity obliteration'''.
*[[Atrial_Thrombosis|Thromboembolic disease]] is a frequent complication. The thromboemboli most often impact in the femoral arteries manifesting as an acute hindlimb paralysis.
[[Category:Cardiomyopathy]]