Isolated Atrial Amyloidosis

Isolated atrial amyloidosis is a form of amyloidosis affecting the atria (blood-collecting chambers) of the heart. It is caused by abnormal accumulation and aggregation of a small protein (peptide) called atrial natriuretic factor (ANF). The disease may play a role in the pathogenesis of atrial fibrillation and the main symptom is arrhythmia.