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Familial aggregation in lone atrial fibrillation
Patrick T Ellinor1, Danita M Yoerger, Jeremy N Ruskin
1Cardiac Arrhythmia Service, Massachusetts General Hospital, 149 13th Street, 4th Floor, Charlestown, Boston, MA, 02129, USA.
Human Genetics
|September 1, 2005
Summary
Genetic factors significantly increase the risk of developing lone atrial fibrillation (AF). Family members of individuals with AF have a substantially higher chance of developing this common heart arrhythmia.
Area of Science:
- Cardiology
- Genetics
- Epidemiology
Background:
- Atrial fibrillation (AF) is the most prevalent clinical arrhythmia.
- AF is a primary risk factor for stroke.
- Understanding genetic contributions to AF is crucial for risk assessment.
Purpose of the Study:
- To investigate the extent of familial aggregation in lone atrial fibrillation.
- To estimate the relative risk of AF among family members of affected individuals.
- To explore the potential Mendelian genetic contribution to lone AF.
Main Methods:
- Comparative prevalence study.
- Analysis of AF prevalence in relatives of lone AF probands.
- Comparison with age- and sex-matched general population data.
Main Results:
- Family members exhibited significantly increased relative risks for AF.
- Specific risk ratios were calculated for sons, daughters, brothers, sisters, mothers, and fathers.
- For example, brothers had a risk ratio of 70 (95% CI: 47-102).
Conclusions:
- Relatives of individuals with lone AF face a substantially elevated risk of developing the condition.
- These findings suggest a significant Mendelian genetic component in the etiology of lone atrial fibrillation.
- Genetic predisposition plays a key role in the development of this common cardiac arrhythmia.