Mitral valve

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.

Last Updated: February 10, 2010

Author: Robin Parks, MS

Medical Review: E. Gregory Thompson, MD - Internal Medicine & Stephen Fort, MD, MRCP, FRCPC - Interventional Cardiology

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