<unk>  is a form of<unk>  affecting the atria of the heart. It is associated with accumulation of the protein atrial natriuretic factor. It may cause abnormal heart rhythms.
Isolated atrial amyloidosis
Nonbacterial thrombotic endocarditis
Viral cardiomyopathy
Amyloid cardiomyopathy
Noncompaction cardiomyopathy
Familial atrial fibrillation
Cardiac amyloidosis
Subacute bacterial endocarditis