Abstract
The clinical cardiologist who examines a case of cardiomyopathy (CMP) should systematically consider the possibility of a genetic origin of the disease. After the clinician has excluded other known causes of heart muscle disease (hypertension, ischemia, drugs such as anthracyclines that may damage the myocardium, myocarditis, etc.), the family history has a critical role in the determination of a genetic origin of the disease.
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Glossary
- Allele:
-
one of the two copies of a gene. Autosome: non-sex chromosome (22 pairs). Carrier: heterozygous individual.
- Dominant:
-
a trait which is expressed when a single mutant allele is present.
- Hemizygosity:
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presence of only one allele of the gene, in the sex chromosomes (x and y).
- Heterozygosity:
-
presence of two different alleles of the gene.
- Homozygosity:
-
presence of two identical alleles of the gene.
- Lyonization:
-
inactivation on one of the two X chromosomes in females.
- Penetrance:
-
proportion of individuals who carry a particular gene mutation and also express the phenotype.
- Proband:
-
first affected family member who seeks medical attention for a genetic disorder.
- Recessive:
-
a trait that can be expressed only when both alleles are mutated.
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Moretti, M., Taylor, M.R.G., Merlo, M., Mestroni, L. (2013). Family History. In: Sinagra, G., Mestroni, L., Camerini, F. (eds) Genetic Cardiomyopathies. Springer, Milano. https://doi.org/10.1007/978-88-470-2757-2_2
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DOI: https://doi.org/10.1007/978-88-470-2757-2_2
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