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Genetic Counseling and Screening Issues in Familial Dilated Cardiomyopathy
Author(s) -
Hanson Emily L.,
Hershberger Ray E.
Publication year - 2001
Publication title -
journal of genetic counseling
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.867
H-Index - 52
eISSN - 1573-3599
pISSN - 1059-7700
DOI - 10.1023/a:1016641504606
Subject(s) - penetrance , genetic counseling , medicine , dilated cardiomyopathy , etiology , cardiomyopathy , genetic testing , disease , human genetics , genetic heterogeneity , cardiology , genetics , heart failure , phenotype , gene , biology
Idiopathic dilated cardiomyopathy (IDC), a treatable condition characterized by left ventricular dilatation and systolic dysfunction of unknown cause, has only recently been recognized to have genetic etiologies. Although familial dilated cardiomyopathy (FDC) was thought to be infrequent, it is now believed that 30‐50% of cases of IDC may be familial. Echocardiographic and electrocardiographic (ECG) screening of first‐degree relatives of individuals with IDC and FDC is indicated because detection and treatment are possible prior to the onset of advanced, symptomatic disease. However, such screening often creates uncertainty and anxiety surrounding the significance of the results. Furthermore, FDC demonstrates incomplete penetrance, variable expression, and significant locus and allelic heterogeneity, making genetic counseling complex. The provision of genetic counseling for IDC and FDC will require collaboration between cardiologists and genetics professionals, and may also improve the recognition of FDC, the availability of support services, and overall outcomes for patients and families.