The mitral valve separates the left upper chamber (left atrium) and left lower chamber (left ventricle) of the heart. The mitral valve is formed from two downward-facing flaps.
- The valve opens when the heart relaxes, allowing blood to flow from the left upper chamber into the left lower chamber of the heart.
- The valve normally closes smoothly when the heart pumps blood out of the left lower chamber to the body.
Caroline Rea, RN, BS, MS



