Dilated cardiomyopathy is defined as left ventricular chamber dilation with decreased systolic dysfunction (FEVG < 40%). There may also be right ventricular dysfunction. Causes are related to intrinsic myocardial damage.
Dilated, thin walled, poorly contracting ventricles +/- atria
Although a variety of aetiologies can result in a dilated cardiomyopathy which are listed as below. Some are classified as separate entities. (See WHO 1995 classification of cardiomyopathies)
- ischaemic (coronary artery disease)
- infectious (myocarditis : virus, bacteria)
- infiltrative disease (sarcoid, amyloid)
- metabolic (uraemia, hypocalcemia, hypophosphataemia, thyrotoxicosis)
- toxic (alcohol, cocaine)
- chemotherapy (doxororubicin)
- others (peri-partum, muscular dystrophies)
- auto-immune cross reactivity (e.g. late onset cardiomyopathy in Chagas disease)
Commonly large left ventricle and atria with pulmonary oedema +/- pleural effusions
- large pericardial effusion
This article is in need of some more references!
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- 1. Dähnert W. Radiology review manual. Lippincott Williams & Wilkins. (2007) ISBN:0781738954. Read it at Google Books - Find it at Amazon
- 2. Miller SW. Cardiac imaging, the requisites. Mosby Inc. (2005) ISBN:032301755X. Read it at Google Books - Find it at Amazon
- 3. Belloni E, De cobelli F, Esposito A et-al. MRI of cardiomyopathy. AJR Am J Roentgenol. 2008;191 (6): 1702-10. doi:10.2214/AJR.07.3997 - Pubmed citation
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