Difference between revisions of "Category:Cardiomyopathy"

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|pagetitle =Cardiomyopathy
 
|pagetitle =Cardiomyopathy
 
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Cardiomyopathies are diseases affecting the cardiac myocardium causing dysfunction.  Primary cardiomyopathies are characterized by having an unknown cause while secondary cardiomyopathies have an identifiable cause.  The primary cardiomyopathies will be the centre of our discussion.
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Cardiomyopathies are diseases affecting the myocardium (cardiac muscle), causing dysfunction.  Primary cardiomyopathies are characterized by having an unknown cause while secondary cardiomyopathies have an identifiable cause.  The primary cardiomyopathies will be the centre of our discussion.
  
'''There are four types of primary cardiomyopathies:'''
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'''Primary cardiomyopathies include:'''
  
 
# [[Dilated Cardiomyopathy|Dilated Cardiomyopathies]]
 
# [[Dilated Cardiomyopathy|Dilated Cardiomyopathies]]
 
# [[Hypertrophic Cardiomyopathy|Hypertrophic Cardiomyopathies]]
 
# [[Hypertrophic Cardiomyopathy|Hypertrophic Cardiomyopathies]]
 
# [[Restrictive Cardiomyopathy|Restrictive Cardiomyopathies]]  
 
# [[Restrictive Cardiomyopathy|Restrictive Cardiomyopathies]]  
# Intermediate/Unclassified Cardiomyopathies - occur when the cardiomyopathy does not match the normal diagnostic checklist for either dilated or hypertrophic cardiomyopathies. Not enough information is available on this condition at this time.
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# Arrhythmogenic Right Ventricular Cardiomyopathy
  
The first three are the most common idiopathic cardiomyopathies.
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Cases that do not fit the diagnostic criteria for any one particular one of these cardiomyopathy phenotypes are usually assigned a diagnosis of ''unclassified cardiomyopathy''.
  
'''There are five types of secondary cardiomyopathies:'''
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'''Secondary cardiomyopathies include:'''
  
 
# Infectious (e.g. Parvovirus, Toxoplasmosis)
 
# Infectious (e.g. Parvovirus, Toxoplasmosis)
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# Nutritional (e.g. L-Carnitine deficiency, Taurine deficiency)
 
# Nutritional (e.g. L-Carnitine deficiency, Taurine deficiency)
 
# Toxic (e.g. Lead, Doxorubicin, Monensin)
 
# Toxic (e.g. Lead, Doxorubicin, Monensin)
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[[Feline Cardiomyopathies]]
 
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===[[Dilated Cardiomyopathy]]===
 
 
 
 
===Hypertrophic cardiomyopathy===
 
 
[[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.
 
 
===[[Restrictive Cardiomyopathy]]===
 
 
 
 
===Other Cardiomyopathies===
 
 
====Feline Hyperthyroidism====
 
 
A hypertrophic cardiomyopathy is seen secondary to this disease in elderly cats.  Thyroid hormones induce the growth of the myocardium.
 
 
====Secondary to toxic agents====
 
 
Includes:
 
*Dilated myopathy in horses with '''monensin''' toxicity.
 
*Dilated myopathy in dogs with long term administration of '''doxorubicin'''.
 
*Dilated myopathy in cats due to '''taurine''' deficiency.
 
 
 
  
  
 
[[Category:Myocardial Pathology]]
 
[[Category:Myocardial Pathology]]
 
[[Category:Cardiovascular_System_-_Degenerative_Pathology]]
 
[[Category:Cardiovascular_System_-_Degenerative_Pathology]]
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[[Category:To_Do_-_Cardiovascular]]
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[[Category:Cardiac Diseases - Dog]]
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[[Category:Cardiac Diseases - Cat]]
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[[Category:Cardiac Diseases - Horse]]
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[[Category:Cardiac Diseases - Cattle]]
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[[Category:Cardiac Diseases - Pig]]
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[[Category:Cardiology Section]]

Latest revision as of 08:20, 4 May 2016

Cardiomyopathy

Cardiomyopathies are diseases affecting the myocardium (cardiac muscle), causing dysfunction. Primary cardiomyopathies are characterized by having an unknown cause while secondary cardiomyopathies have an identifiable cause. The primary cardiomyopathies will be the centre of our discussion.

Primary cardiomyopathies include:

  1. Dilated Cardiomyopathies
  2. Hypertrophic Cardiomyopathies
  3. Restrictive Cardiomyopathies
  4. Arrhythmogenic Right Ventricular Cardiomyopathy

Cases that do not fit the diagnostic criteria for any one particular one of these cardiomyopathy phenotypes are usually assigned a diagnosis of unclassified cardiomyopathy.


Secondary cardiomyopathies include:

  1. Infectious (e.g. Parvovirus, Toxoplasmosis)
  2. Infiltrative (e.g. Neoplasia)
  3. Metabolic (e.g. Endocrine disorders)
  4. Nutritional (e.g. L-Carnitine deficiency, Taurine deficiency)
  5. Toxic (e.g. Lead, Doxorubicin, Monensin)

Feline Cardiomyopathies

Pages in category "Cardiomyopathy"

The following 4 pages are in this category, out of 4 total.