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| Primary cardiomyopathies | Secondary cardiomyopathies |
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| Genetic (hypertrophic cardiomyopathy; conduction abnormalities: prolonged QT syndrome; Brugada syndrome) | Infiltrative (amyloidosis and Gaucher disease) |
| Mixed (dilated cardiomyopathy; restrictive cardiomyopathy) | Storage (haemochromatosis and Fabry’s disease) |
| Acquired (inflammatory myocarditis, peripartum, stress cardiomyopathy—“broken heart syndrome” or tako-tsubo) | Toxicity (drugs, alcohol, heavy metals, and chemicals/chemotherapy) |
| Inflammatory (sarcoidosis) endocrine (diabetes mellitus; thyroid disorders; hyperparathyroidism), cardiofacial (Noonan syndrome, lentiginosis) neuromuscular/neurological, nutritional deficiencies, and autoimmune and collagen disorders |
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