Genetics and inherited tendency

In some people, AF has a stronger inherited component. This is more likely when AF begins at a younger age or when multiple close relatives have AF.

What “genetic” means in AF

Genetic influences can work in different ways:

• Rare inherited changes that directly affect electrical properties of heart cells.
• Inherited tendency to develop conditions that lead to AF (such as high blood pressure).
• Family patterns of heart structure or cardiomyopathy that predispose to AF.

When to consider a stronger genetic role

• AF diagnosed at a young age (for example under 50) without clear contributors
• Multiple family members with AF
• Family history of cardiomyopathy or sudden unexplained death

Do people need genetic testing?

Most people with AF do not need genetic testing. In selected cases — especially early-onset AF with a strong family history — your cardiologist may discuss it. Even without testing, family history can guide closer monitoring and addressing modifiable risk factors early.