I51: Complications and ill-defined descriptions of heart disease

I51.5: Myocardial degeneration

The heart pumps blood through the body. Inside the heart are 4 chambers. There are 2 heart atria and 2 ventricles. Both heart atria and both ventricles are separated from each other by a partition. The heart is composed of a thick muscle layer and a thin membrane in the heart interior. An external sac, the pericardium, surrounds the heart. This sac consists of a tight membrane.

The muscle layer in your heart is damaged. This can occur due to various disorders or due to age.