Isolated atrial amyloidosis is a form of

amyloidosis Amyloidosis is a group of diseases in which abnormal proteins, known as amyloid fibrils, build up in tissue. There are several non-specific and vague signs and symptoms associated with amyloidosis. These include fatigue, peripheral edema, weight ...

affecting the atria of the heart. It is associated with accumulation of the protein

atrial natriuretic factor Atrial natriuretic peptide (ANP) or atrial natriuretic factor (ANF) is a natriuretic peptide hormone secreted from the cardiac atria that in humans is encoded by the NPPA gene. Natriuretic peptides (ANP, BNP, and CNP) are a family of hormone/pa ...

. It may cause abnormal heart rhythms.

References

{{Amyloidosis Amyloidosis Heart diseases Protein folding