Sunrise, sunset, day length and solar time for Ukhta. 1  Sunrise: 04:03AM. 2  Sunset: 06:49PM. 3  Day length: 14h 47m. 4  Solar noon: 11:26AM. 5  The current local time in Ukhta is 34 minutes behind apparent solar time.
What Is Mitral Regurgitation? Mitral regurgitation (MR) occurs when the heart's mitral valve does not close completely, allowing blood to regurgitate (or leak) through the valve when it should be closed. Here is a brief review of the heart's chambers and valves.
Any condition that damages the aortic valve can cause regurgitation. Causes of aortic valve regurgitation may be: A congenital heart defect. You may have been born with an aortic valve that has one leaflet (unicuspid aortic valve) or two leaflets (bicuspid aortic valve) rather than the normal three leaflets.