Some autoimmune diseases also involve heart problems. For example, sarcoidosis, which develops non-caseating granulomas, can affect multiple organs (the heart, for example). Arrhythmias, heart block, and even heart failure can occur due to cardiac sarcoidosis. At first, the mild inflammation may lead to subtle heart-rhythm disturbances, which are detectable by examination. However, sarcoidosis came forward as a more intricate complication.
Furthermore, Addison's disease can also show heart rhythm abnormalities. Heart issues can be linked to diabetes, too. Those who suffer from diabetes and obesity are the most at risk of developing heart disease.
