Is Lub Dub Sound: What

During diastole, the ventricles are relaxing and filling with blood from the atria. No major valves are snapping shut, so there is no loud sound. This silence is just as important as the beats, because it is the time when the heart refills for the next pump.

A murmur is a valve closing. It is the sound of turbulent blood flow . what is lub dub sound

In short: (AV valves close). Dub (Semilunar valves close). Pause (Heart refills). Repeat 60–100 times per minute. That is the rhythm of life. During diastole, the ventricles are relaxing and filling

The order is based on the in the heart cycle. Systole (contraction) always comes before diastole (relaxation). The AV valves (lub) must close at the start of contraction. The semilunar valves (dub) close at the end of contraction. A murmur is a valve closing

If you’ve ever listened to a healthy heart through a stethoscope, the sound you hear is a familiar, two-beat rhythm: lub-dub, lub-dub, lub-dub . This is not just a random noise; it is the acoustic signature of your heart valves snapping shut. It is the sound of life itself.