References External links Echocardiography in Mitral stenosis at Wikiecho Echocardiographic features of Mitral Stenosis Mitral Valve Repair at The Mount Sinai Hospital

The mitral valve opens when the pressure in the left atrium is greater than the pressure in the left ventricle.

In an Annular eclipse the Sun and Moon are exactly in line, but the apparent size of the Moon is smaller than that of the Sun. Hence the Sun appears as a very bright ring, or annulus, surrounding the dark disk of the Moon.

To our great concern, Ghrer suffers from hypertensive vascular disease and mitral valve prolapse. We fear a deterioration in his health condition in Syrian detention cells, known for their poor environmental, psychological and physical conditions. The detention centers environment and their lack of the necessary medical equipment may pose a direct threat to his life.