If untreated, this abnormal heart rhythm can lead to dizziness, chest pain, a sensation of fluttering or pounding in the chest (palpitations), shortness of breath, or fainting (syncope). Atrial<unk>  also increases the risk of stroke. Complications of<unk>  can occur at any age, although some people with this heart condition never experience any health problems associated with the disorder. Atrial<unk>  is the most common type of sustained abnormal heart rhythm (arrhythmia), affecting more than 3 million people in the United States. The risk of developing this irregular heart rhythm increases with age. The incidence of the familial form of atrial<unk>  is unknown; however, recent studies suggest that up to 30 percent of all people with atrial<unk>  may have a history of the condition in their family.
Familial atrial fibrillation
Familial aortic dissection
Long QT syndrome
Short QT syndrome
Isolated atrial amyloidosis
Phidippides cardiomyopathy
Familial thoracic aortic aneurysm
Familial hypercholesterolemia