What is cardiac amyloidosis, where abnormal proteins clump in the heart?

In cardiac amyloidosis, abnormal amyloid proteins can lead to the thickening of the heart wall, making it more challenging for the heart to fill with blood between beats. — Filepic

Amyloidosis is a rare condition defined by the abnormal production of proteins that bind together to form amyloid proteins.

These amyloids can gather in different organs throughout the body, including the heart, liver and kidneys.