Anatomy and Electrophysiology
Layers of the Heart
The heart wall is arranged into three layers.
- Pericardium is the sac that encloses the heart. It is also known as the outermost layer of the heart.
- Myocardium is the thickest layer of the heart made of pure muscle and it gets damaged during a heart attack. It makes up the bulk of the heart.
- Endocardium is the thin layer of tissue heart that lines the heart’s chambers and valves. The cardiac conduction system is located in this layer of the heart.
