The first heart sound, or S1, is the "lub" of a normal heartbeat. It's a high-pitched sound that occurs at the beginning of systole—when the heart pumps blood out of the heart into the lungs or body.

This new imaging technique, when applied to humans, could both improve our understanding of the circulatory system (veins, ...

To be able to observe the blood flow in the artificial heart in real time in the MRI, the researchers an Linköping University had to build a full-scale model of the human circulatory system. Using ...

Heart valve diseases affect how blood flows through the heart muscle. Not all people experience symptoms, even if the condition is severe. You may recognize these early signs and symptoms of heart ...

In a healthy heart, blood flows in only one direction. The four valves of the heart prevent blood from flowing backward. But a leaky heart valve, or heart valve regurgitation, causes a backflow of ...

A sudden restriction of blood flow to the brain. That's how scientists have traditionally explained why people faint. But several mysteries remain: What causes someone's blood flow to spontaneously ...

A new study examines the effect of rapid infusion of 2meq/kg of sodium bicarbonate (NaHCO3) in an ovine model on gas exchange and coronary and cerebral perfusion in the immediate post-resuscitation ...

Using magnetic cameras, researchers at Linköping University have examined blood flow in an artificial heart in real time. The results make it possible to design the heart in a way to reduce the risk ...