Lub-dub Sound Of Heart Official

So go ahead—place a hand on your chest. Feel that quiet thumping? That’s not just a sound. It’s the soundtrack of being alive.

Lub-dub. Lub-dub.

Let’s break down the simple genius behind the . The Short Answer: Two Sounds, Two Actions Your heart is a double pump. The lub happens when the upper chambers (atria) squeeze blood into the lower chambers (ventricles) and the valves between them snap shut. The dub follows when the lower chambers pump blood out to your body and lungs, and the exit valves snap shut. lub-dub sound of heart