What Does Lub Dub Mean -

You’ve heard the phrase "lub dub" in movies and doctor’s offices, but what does it actually mean? We break down the science behind the heartbeat sound and why it matters. Have you ever been sitting in a quiet room, resting your head on a pillow, and suddenly heard your own heart beating? Lub-dub. Lub-dub. Lub-dub.

What Does "Lub Dub" Mean? The Sound of a Healthy Heart what does lub dub mean

It’s one of the most recognizable sounds on the planet. But have you ever stopped to wonder: You’ve heard the phrase "lub dub" in movies

At this moment, the heart's ventricles (the strong, lower pumping chambers) contract. They squeeze to push blood upward. To prevent that blood from leaking backward into the upper chambers (the atria), two flaps called the slam shut. Lub-dub

Once that blood is pushed out, two different valves—the —snap shut to stop the blood from flowing back into the heart.