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A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction. [1] Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various ...
Guillain–Barré syndrome (GBS) is a rapid-onset muscle weakness caused by the immune system damaging the peripheral nervous system. [3] Typically, both sides of the body are involved, and the initial symptoms are changes in sensation or pain often in the back along with muscle weakness, beginning in the feet and hands, often spreading to the arms and upper body. [3]
The diagnosis should be made only after excluding other possible causes of similar symptoms such as tuberculosis. [6] Sarcoidosis may resolve without any treatment within a few years. [2] [5] However, some people may have long-term or severe disease. [5] Some symptoms may be improved with the use of anti-inflammatory drugs such as ibuprofen. [8]
Haplogroup G2a1 (also known as G-FGC753 and previously as G-L293) and its subclades represent the majority of haplogroup G samples in some parts of the Caucasus Mountains area. They are found only in tiny numbers elsewhere. So far all G2a1 persons have a value of 10 at STR marker DYS392.
Frequency. 2% of people over 65 (developed world) [ 1] Aortic stenosis ( AS or AoS) is the narrowing of the exit of the left ventricle of the heart (where the aorta begins), such that problems result. [ 1] It may occur at the aortic valve as well as above and below this level. [ 1] It typically gets worse over time. [ 1]
A double check valve or double check assembly (DCA) is a backflow prevention device designed to protect water supplies from contamination. [ 1] It is different from the two-way check valves (sometimes erroneously referred to as double check valves) used in air brake systems on heavy trucks which select from the highest pressure source.
Heyde's syndrome is a syndrome of gastrointestinal bleeding from angiodysplasia in the presence of aortic stenosis. [ 1][ 2] It is named after Edward C. Heyde, MD, who first noted the association in 1958. [ 3] It is caused by cleavage of Von Willebrand factor (vWF) due to high shear stress forces from aortic valvular stenosis.
Bette Midler talks to the TODAY show's Hoda Kotb about her new movie, "The Fabulous Four," and reflects on her other iconic roles in "Beaches," "Hello Dolly!" and more.