Familial atrial fibrillation is a condition that runs in families and affects the heart's rhythm. It is also known as hereditary atrial fibrillation. There are several synonyms for familial atrial fibrillation, including genetic atrial fibrillation, inherited atrial fibrillation, and familial AF. Other terms used to describe this condition include familiar AF, familial cardiomyopathy with atrial fibrillation, and genetic arrhythmia syndrome. Atrial fibrillation is a type of irregular heartbeat that can lead to serious health problems, and when it runs in families, it may be caused by inherited genetic mutations. Identifying familial atrial fibrillation early is essential to prevent complications and manage this potentially life-threatening condition.