Lub Dub Dub Heart: Sound

The normal heartbeat sounds like “lub-dub” — that’s the mitral/tricuspid valves closing (lub) followed by the aortic/pulmonary valves closing (dub).

The "lub dub" sound is the rhythmic signature of a healthy heart, but an extra beat—creating a "lub dub dub" pattern—often signals something more complex. This three-beat rhythm, known medically as a , can be a normal occurrence in specific groups or a critical warning sign of heart failure. The Anatomy of "Lub Dub" (S1 and S2)

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In some cases, a third heart sound, often described as a "dub" sound, can be heard, making the sequence "lub-dub-dub." This third sound, also known as S3, is usually heard in younger individuals and athletes, but can also be a sign of certain heart conditions.

But if you hear ? That could be a gallop rhythm (S3 heart sound) — sometimes normal in young adults or athletes, sometimes a sign to see a doctor. But poetically? It’s your heart adding an extra beat for joy, excitement, or that extra-special someone. 💓 The normal heartbeat sounds like “lub-dub” — that’s

A normal heartbeat consists of two primary sounds, medically termed S1 and S2. The Texas Heart Institute Heart Murmurs - The Texas Heart Institute

The sequence of heart sounds can be broken down as follows: The Anatomy of "Lub Dub" (S1 and S2)

Lub. Dub. Dub. Listen close — it’s never just two.