Scientists have investigated the ways oxygen permeates heart valves and the role hypoxia plays in valve diseases. As the valves in a heart stretch with each beat, their cells take in life-giving ...

There are three types of bicuspid aortic valves — types 0, 1, and 2. Experts classify these types based on whether the leaflets of the valve have fused to form a ridge. A bicuspid aortic valve is a ...

Surgery is usually the best fix for a severe heart valve disease. Different types of heart valve blockages can happen, and surgery is necessary to fix these problems. Your heart is split into four ...

On this installment of Weekly Boiler Tips learn about the different valve types, their functionalities and their distinct purposes in the boiler room From gate valves to globe valves and beyond, learn ...

Valvular heart disease, also called heart valve disease, occurs when you have a diseased or damaged heart valve. When your heart pumps blood, your valves open and close to keep blood flowing in the ...

In hydronic heating, to control where heated water goes to various sections of a building, the system might rely on two or more zone valves. A zone valve opens or closes based on demand from a ...

Equipment for gas chromatography, liquid chromatography and mass spectrometry is complex, with multiple subsystems that control the flow of sample analyte, carrier gas and solvent fluids. The ...

Thermostatic expansion valves (TXVs) come in many different shapes and sizes. Although they all are designed to control the superheat value of the refrigerant leaving an evaporator, there are some ...