Diagnosis
Among the diagnostic procedures done to determine a cardiomyopathy are:
Physical exam
Family history
Blood test
ECG
Echocardiogram
Stress test
Genetic testing

Classification
Cardiomyopathies can be classified using different criteria:
Primary/intrinsic cardiomyopathiesCongenital
Hypertrophic cardiomyopathy (HCM)
Arrhythmogenic right ventricular cardiomyopathy (ARVC)
Left ventricular noncompaction
Ion Channelopathies like the Long QT syndrome and the very rare Short QT syndrome
Catecholaminergic polymorphic ventricular tachycardia
Mixed
Dilated cardiomyopathy (DCM)
Restrictive cardiomyopathy (RCM)
Brugada syndrome
Acquired
Stress cardiomyopathy
Myocarditis, inflammation of and injury to heart tissue due in part to its infiltration by lymphocytes and monocytes
Eosinophilic myocarditis, inflammation of and injury to heart tissue due in part to its infiltration by eosinophils
Ischemic cardiomyopathy (not formally included in the classification, due to ischemic cardiomyopathy being a direct result of another cardiac problem)
Secondary/extrinsic cardiomyopathiesMetabolic/storage
Fabrys disease
Hemochromatosis
Endomyocardial
Endomyocardial fibrosis
Hypereosinophilic syndrome
Endocrine
Diabetes mellitus
Hyperthyroidism
Acromegaly
Cardiofacial
Noonan syndrome
Neuromuscular
Muscular dystrophy
Friedreichs ataxia
Other
Obesity-associated cardiomyopathy

Treatment
Treatment may include suggestion of lifestyle changes to better manage the condition. Treatment depends on the type of cardiomyopathy and condition of disease, but may include medication (conservative treatment) or iatrogenic/implanted pacemakers for slow heart rates, defibrillators for those prone to fatal heart rhythms, ventricular assist devices (VADs) for severe heart failure, or catheter ablation for recurring dysrhythmias that cannot be eliminated by medication or mechanical cardioversion. The goal of treatment is often symptom relief, and some patients may eventually require a heart transplant. See also
Myopathy, a condition affecting skeletal muscles
Fibrosing cardiomyopathy, a disease in great apes
Basic Research in Cardiology

References
Further reading
Boudina, Sihem; Abel, Evan Dale (1 March 2010). "Diabetic cardiomyopathy, causes and effects". Reviews in Endocrine & Metabolic Disorders. 11 (1): 31–39. doi:10.1007/s11154-010-9131-7. ISSN 1389-9155. PMC 2914514. PMID 20180026. Marian, A. J.; Roberts, Robert (1 April 2001). "The Molecular Genetic Basis for Hypertrophic Cardiomyopathy".
Journal of Molecular and Cellular Cardiology. 33 (4): 655–670. doi:10.1006/jmcc.2001.1340. ISSN 0022-2828. PMC 2901497. PMID 11273720. Acton, Q. Ashton (2013). Advances in Heart Research and Application: 2013 Edition. Scholarly Editions. ISBN 978-1-481-68280-0. Towbin, JA (2014). "Inherited cardiomyopathies". Circulation Journal. 78 (10): 2347–56. doi:10.1253/circj.cj-14-0893. ISSN 1347-4820. PMC 4467885. PMID 25186923. Maron, Barry J.; Udelson, James E.; Bonow, Robert O.; Nishimura, Rick A.; Ackerman, Michael J.; Estes, N. A. Mark; Cooper, Leslie T.; Link, Mark S.; Maron, Martin S. (1 December 2015). "Eligibility and Disqualification Recommendations for Competitive Athletes With Cardiovascular Abnormalities: Task Force 3: Hypertrophic Cardiomyopathy, Arrhythmogenic Right Ventricular Cardiomyopathy and Other Cardiomyopathies, and Myocarditis: A Scientific Statement From the American Heart Association and American College of Cardiology". Circulation. 132 (22): e273–280. doi:10.1161/CIR.0000000000000239. ISSN 1524-4539. PMID 26621644. S2CID 207639288. External links
Cardiomyopathy at Curlie