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Is Sudden Cardiac Death Genetic?
- Heritability
- ~45%
- Inheritance
- polygenic
- Key genes
- SCN5A KCNQ1 KCNH2
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Genetic channelopathies and cardiomyopathies account for many cases of sudden cardiac arrest in young people. Family history warrants screening.
How Genetic Is Sudden Cardiac Death?
Sudden Cardiac Death involves complex interactions between multiple genes and environmental factors. Heritability estimates range up to 45%, though no single gene determines outcome on its own.
Key genes associated with Sudden Cardiac Death: SCN5A KCNQ1 KCNH2. Variants in these genes have been identified through genome-wide association studies (GWAS) and clinical research as influencing susceptibility or severity.
Source: MedlinePlus Genetics
Does Family History Matter for Sudden Cardiac Death?
Family history can be informative for Sudden Cardiac Death, but its predictive power is limited because many genes — each with small effects — combine with environmental influences. A family history of the condition may prompt earlier or more frequent screening.
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