Lub Dub Sounds Systole Diastole

Listening to these sounds provides vital diagnostic information.

"The human heart doesn't sing. It knocks. Two knocks per beat. Lub... Dub. lub dub sounds systole diastole

The "lub" sound, or , is the first and typically lower-pitched, longer-lasting sound in the pair. Lub dub (video) | Circulatory system May 5, 2014 Khan Academy·khanacademymedicine Two knocks per beat

The marks Systole . This is the heart's power move. The bottom chambers—the ventricles—squeeze tight. The valves between the upper and lower chambers (the AV valves) slam shut. That slamming door? That’s your 'Lub.' The "lub" sound, or , is the first

Between the and the Dub lies life. Between the Dub and the next Lub lies rest. Listen closely. That rhythm is the only conversation you never want to end.

In the language of the chest wall, there are only two syllables.