Lub Dub Sounds Systole Diastole |verified| May 2026
Tap the sound on to hear your own lub-dub. [Visual: Animation of a beating heart with valves opening/closing]
In the language of the chest wall, there are only two syllables. lub dub sounds systole diastole
🔊 This is the loudest sound. It happens when the ventricles contract (Systole). The mitral and tricuspid valves snap shut, pushing blood up and out to your lungs and body. Think of it as the "Push." Tap the sound on to hear your own lub-dub
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