Stephen C Schimpff's Blog Posts Tagged 'cardiac' (1)

The mitral valve separates the heart’s left atrium from the left ventricle. When the ventricle contracts to send blood to the aorta and out to the body, the mitral valve closes to prevent blood rushing backward into the atrium and back to the lungs. The mitral valve can become stiff and tight, called stenosis or it can become unable to close tightly, called regurgitation. Once the regurgitation becomes sufficiently severe to cause heart failure, the death rate reaches about 5% per year. Most…