: These include the mitral valve and tricuspid valve , which separate the atria from the ventricles.
The lub-dub is not just a cute onomatopoeia – it’s a precise acoustic event from valve closures. Mimic it correctly, and you’re speaking the language of cardiology. lub-dub sound
The first sound, , is a lower-pitched, slightly longer sound that marks the beginning of systole (the heart's contraction phase). : These include the mitral valve and tricuspid
The "Lub-Dub" sound is the acoustic signature of a functioning heart. Contrary to popular belief, these sounds are caused by blood hitting the heart walls. Instead, they are caused by the sudden closure of the heart valves, which creates vibrations that travel through the chest wall. The first sound, , is a lower-pitched, slightly
| Sound | Name | Possible significance | |-------|------|----------------------| | Lub-dub- | Murmur | Turbulent blood flow (often benign, sometimes valve disease) | | Lub- split dub | Split S2 | Aortic & pulmonic valves closing slightly apart (normal on inspiration) | | Extra sound (S3) | Ventricular gallop | “Ken-tuc-ky” rhythm (normal in youth, sign of failure in adults) | | Extra sound (S4) | Atrial gallop | “Ten-nes-see” rhythm (stiff ventricle, often hypertensive) |