Amyloidosis refers to a group of diseases in which insoluble protein is abnormally deposited in tissues and organs, changing their structure and function.
Polymyalgia rheumatica (PMR) and giant cell arteritis (GCA) are inflammatory conditions which cause pain. In up to 50% of cases, the diseases are comorbid.
Arrhythmia or irregular heart beat includes tachyarrhythmia, where the heart beats faster, and bradyarrhythmias, where the heart beats slower than normal.