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Diagnostic evaluation of hypertrophic cardiomyopathy in its clinical and preclinical phases Mattos BP; Torres MA; Freitas VCArq Bras Cardiol 2008[Jul]; 91 (1): 51-62Hypertrophic cardiomyopathy is a familial, genetic disease caused by mutations in genes encoding sarcomeric proteins. It is characterized by various deGrees of left ventricular hypertrophy, usually diffuse, predominantly involving the interventricular septum. The asymptomatic forms with mild or no segmental hypertrophy makes it difficult to establish the diagnosis and screening for familial forms. Its high penetrance is often incomplete and, as a result, 20% to 30% of adults who carry disease-causing gene mutations do not express the phenotype. The susceptibility to sudden death and likelihood of late expression makes establishing a preclinical diagnosis all the more important. The use of Doppler echocardiography and magnetic resonance imaging, in conjunction with a detailed ECG analysis, may be useful in this process. Molecular genetic studies can identify mutations in 60% to 80% of the cases. However, its complex, time-consuming and costly nature, coupled with an inadequate assessment of genotype-phenotype relationships, limits its routine application. Major advances in imaging methods and the introduction of more simplified molecular techniques may contribute to clinical and preclinical diagnosis of hypertrophic cardiomyopathy, in addition to allowing implementation of therapeutic strategies to prevent or delay the development of the disease.|Biopsy[MESH]|Cardiomyopathy, Hypertrophic, Familial/diagnosis[MESH]|Cardiomyopathy, Hypertrophic/*diagnosis/genetics[MESH]|Echocardiography, Doppler[MESH]|Genotype[MESH]|Humans[MESH]|Hypertrophy, Left Ventricular/*diagnosis/genetics[MESH]|Magnetic Resonance Spectroscopy[MESH]|Phenotype[MESH] |
