Aortic valve stenosis occurs when the aortic valve narrows, constricting blood flow from the heart through the artery and to the entire body. In severe cases, it can lead to heart failure. Identifying the condition can be ...
General Physics
Aug 30, 2022
0
93
Paper is at the heart of an experimental device developed by Rice University bioengineers to study heart disease.
Materials Science
Aug 5, 2019
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39
Scientists at ETH Zurich and the South African company Strait Access Technologies are using 3-D printing to produce custom-made artificial heart valves from silicone. This could help meet an aging population's growing demand ...
Biotechnology
Jul 23, 2019
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236
The human heart beats approximately 35 million times every year, effectively pumping blood into the circulation via four different heart valves. Unfortunately, in over four million people each year, these delicate tissues ...
Materials Science
May 18, 2017
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93
Microbiologists at Trinity College Dublin have discovered a new way to prevent bacteria from growing on medical devices such as hip replacements or heart valves implanted in the human body. The discovery is a step towards ...
Cell & Microbiology
Mar 20, 2017
0
477
Every year thousands of people are fitted with artificial heart valves to replace their own malfunctioning valve. Many of these patients, however, have to remain on drugs that stop blood clotting on these artificial valves. ...
Materials Science
Feb 18, 2014
1
0
(Phys.org) —Newcastle University scientists have revealed the mechanism that causes a slime to form, making bacteria hard to shift and resistant to antibiotics.
Biochemistry
Apr 12, 2013
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0
Researchers from computer firm IBM say they have invented a new non-toxic gel that can kill deadly drug-resistant bacteria by cutting through the sludge that shelters them and attacking the germ's cell membrane.
Cell & Microbiology
Jan 25, 2013
5
0
A group of researchers in Israel, the United States and other nations have made important advances in the rapidly-expanding field of "regenerative medicine," outlining for the first time connections in genetic regulation ...
Cell & Microbiology
Oct 30, 2012
0
0
Scientists at The Scripps Research Institute have unraveled a complex chemical pathway that enables bacteria to form clusters called biofilms. Such improved understanding might eventually aid the development of new treatments ...
Cell & Microbiology
Apr 26, 2012
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0
In anatomy, the heart valves maintain the unidirectional flow of blood in the heart by opening and closing depending on the difference in pressure on each side. They are mechanically similar to reed valves.
There are four valves in the heart (not counting the valve of the coronary sinus, and the valve of the inferior vena cava):
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