Layers of the Heart

Anatomy and Electrophysiology

Layers of the Heart

The heart wall is arranged into three layers.

  1. Pericardium is the sac that encloses the heart. It is also known as the outermost layer of the heart.
  2. 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.
  3. 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.