67. Niemann JT, Bessen HA, Rothstein RJ, et al. Electrocardiographic criteria for tricyclic antidepressant cardiotoxicity. Am J Cardiol 1986 May 1;57(13):1154-1159. (Comparative; 25 patients) ++
Cardiomyopathy versus discreet heart muscle disease
dilated cardiomyopathy | hypertrophic cardiomyopathy | restrictive cardiomyopathy | arrhythmogenic right ventricular cardiomyopathy |
idiopathic | left and/or right ventricular hypertrophy | restrictive filling and reduced diastolic volume of either or both ventricles | progressive fibfrofatty replacement of the right ventricular myocardium |
familial/genetic | usually assymetric and involving the iv septum | normal or near-normal systolic function and wall thickness | septum relatively spared |
viral and/or immune | LV volume typically normal or reduced (i.e. non dilated | increase interstitial fibrosis may be present | Familial disease is common with autosomal dominant inheritance and incomplete penetrance |
alcoh/toxic | systolic gradients are common | idiopathic or associated with other disease such as amyloidosis; endomyocardial disease with or without eosinophilia | |
assoc with recognized cv disease in which the degree of myodardial dysfunction is not explained by the abnormal loading conditions or the extent of ischemic damage | Familial disease with autosomal dominant inheritance predominates |
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histology non specific | mutations in sarcomeric contractile protein genes cause disease | ||
presents with CHF often progressive | Typical morphological changes include myocyte hypertrophy and disarray surrounding areas of increased loose connective tissue. | Presentation with arrhythmia and sudden death is common especially in the young | |
Arrhythmias | Arrhythmias | ||
thromboembolism | |||
sudden death | Sudden death | Unclassified Cardiomyopathies
Unclassified cardiomyopathies include a few cases that do not fit readily into any group (eg, fibroelastosis, noncompacted myocardium, systolic dysfunction with minimal dilatation, mitochondrial involvement).
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Specific Cardiomyopathies
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these were previousl defined as specific heart muscle diseases |
Ischemic cardiomyopathy | presents as dilated cardiomyopathy impaired contractile performance not explained by extent of coronary a. disease or ischemic damage |
Valvular cardiomyopathy | presents with ventricular dysfunction out of proportion to the abnormal loading conditions |
Hypertensive cardiomyopathy | LVH, Dilated or Restricted with Failure |
Inflammatory cardiomyopathy | myocarditis in association with cardiac dysfunction: idiopathic, autoimmune, infectious: Chagas disease, HIV, enterovirus, adenovirus, cytomegalovirus. |
Metabolic cardiomyopathy | Metabolic cardiomyopathy includes the following categories: Endocrine, eg, thyrotoxicosis, hypothyroidism, adrenal cortical insufficiency, pheochromocytoma, acromegaly, and diabetes mellitus; familial storage disease and infiltrations, eg, hemochromatosis, glycogen storage disease, Hurler's syndrome, Refsum's syndrome, Niemann-Pick disease, Hand-Schüller-Christian disease, Fabry-Anderson disease, and Morquio-Ullrich disease; deficiency, eg, disturbances of potassium metabolism, magnesium deficiency, and nutritional disorders such as kwashiorkor, anemia, beri-beri, and selenium deficiency; amyloid, eg, primary, secondary, familial, and hereditary cardiac amyloidoses, familial Mediterranean fever, and senile amyloidosis. |
General System Disease | connective tissue disorders such as sle, polyarteritis nodosa, RA, Sclerodermn, dermatomyositis. Infiltrations and gramulomas such as sarcoidosis and leukemia |
Muscular dystrophies | Duchenne, Becker-type and myotonic dystrophies |
Neuromuscular disorders | Noonan's Syndrome Friedreich's ataxia, lentiginosis |
sensitivity and toxic reactions | alcohol, catecholamines, anthracyclines, radiation, misc. |
Peripartal cardiomyopathy | |