What Is Lub Dub Sound 🆕 Top

But what exactly causes these two distinct sounds? Why doesn't the heart make just one sound? And what happens when "lub-dub" turns into something else, like a "whoosh" or a "click"?

In simple terms:

Thus, the sound sequence is permanently fixed: . If you ever heard "dub-lub," it would mean the heart was beating backward, which is impossible in a living person. what is lub dub sound

(ventricles squeeze, AV valves close) → DUB (ventricles relax, semilunar valves close) → pause (heart fills with blood) → LUB ... But what exactly causes these two distinct sounds