What Causes The Lub Dub Sound Of The Heartbeat Hot! -

While some murmurs are harmless (innocent murmurs), others indicate that the heart is working too hard or that blood is leaking in the wrong direction.

After the ventricles have finished pumping blood out to the lungs and the rest of the body, they begin to relax. what causes the lub dub sound of the heartbeat

The "dub" is the sound of these exit valves closing. It is typically shorter and sharper than the "lub" because the closing motion happens very quickly due to the high pressure in the arteries. While some murmurs are harmless (innocent murmurs), others

The first sound, the "lub," is known medically as . It is typically lower in pitch and lasts slightly longer than the second sound. What causes it? It is typically shorter and sharper than the

It occurs when the Atrioventricular (AV) valves —the mitral and tricuspid valves—snap shut.

As the pressure in the ventricles drops below the pressure in the major arteries, blood tries to flow back toward the heart. This back-pressure catches the flaps of the semilunar valves, snapping them shut.