The four valves of the heart allow blood to flow through the heart in the right direction. The valves open or close each time the heart beats. Problems with the heart valves can lead to palpitations, ...

During a routine physical in 1965, Philip Bryson learned that he had a life-threatening heart murmur. Follow-up exams revealed that he'd been born with a defective aortic valve, and at age 25, the ...

Exactly one year ago today, we reported on the launch of Muc-Off’s unique Big Bore Tubeless Valves. With a ball valve in place of a standard valve core, Muc-Off claims the patent-pending Big Bore ...

This file type includes high resolution graphics and schematics when applicable. The images above are simple cross sections of a typical spool valve (left) and a poppet valve (right). (Courtesy of ...