TY - CHAP M1 - Book, Section TI - Cardiomyopathies and Pericardial Disease A1 - Niemann, James T. A2 - Tintinalli, Judith E. A2 - Stapczynski, J. Stephan A2 - Ma, O. John A2 - Yealy, Donald M. A2 - Meckler, Garth D. A2 - Cline, David M. PY - 2016 T2 - Tintinalli’s Emergency Medicine: A Comprehensive Study Guide, 8e AB - The term cardiomyopathy describes a heterogeneous group of diseases that directly alter cardiac structure, impair myocardial function, or alter myocardial electrical properties. Discoveries in molecular genetics and the description of (ion) channelopathies as diseases have prompted new definitions and classification of cardiomyopathies.1 Primary cardiomyopathies are diseases that solely or predominantly involve the myocardium1; the most common disorders are listed in Table 55-1. Secondary cardiomyopathies include heart muscle diseases associated with specific systemic disorders. At present, no classification method perfectly distinguishes all forms of cardiomyopathy, and overlap exists between categories.2,3 Secondary cardiomyopathies often present with hemodynamic findings similar to those of the idiopathic dilated or restrictive forms of cardiomyopathy. The most common causes of secondary cardiomyopathies are listed in Table 55-2. As a group, the cardiomyopathies are the third most common form of cardiac disease encountered in the United States, following coronary (ischemic) heart disease and hypertensive heart disease. Hypertrophic cardiomyopathy is the second most common cause of sudden cardiac death in the adolescent population and the leading cause of sudden death in competitive athletes.4 SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/28 UR - accessemergencymedicine.mhmedical.com/content.aspx?aid=1121504147 ER -