What Produces The Lub Dub Heart Sounds 📥

Then comes (S2), marking the end of systole and the beginning of diastole (relaxation).

The "Dub" is the sound of the escape hatches closing after the blood has left. Part 4: The Bizarre Physics of the Silent Gap Notice the rhythm: Lub...Dub...pause...Lub...Dub...pause. what produces the lub dub heart sounds

Place your hand on the left side of your chest. Feel that? Thump-thump... thump-thump. Then comes (S2), marking the end of systole

The "Lub" is the sound of the exit doors closing just as the heart tries to pump. Part 3: The "Dub" (The Escape Hatch Snap) After the "Lub," the ventricles continue to squeeze. They blast blood out through two other doors: the pulmonary valve (to the lungs) and the aortic valve (to the body). For a brief moment, the heart is emptying. Place your hand on the left side of your chest

When they snap shut, they create a higher-pitched, crisper snap than the "Lub." This is the

For most of us, it’s the most reliable metronome we’ll ever own. We call it a heartbeat, but in medical terms, it’s known as the . It’s so familiar that we rarely question it. We assume the sound is simply the heart contracting like a fist squeezing blood.