There are two main types of valves involved in the "lub-dub":
When these valves snap shut to prevent backflow, they create turbulence in the blood. It is this snapping shut and the resulting turbulence that we hear as the heartbeat. what causes the lub dub sound of your heartbeat
It is caused by the closure of the aortic and pulmonary valves (the semilunar valves). There are two main types of valves involved
, are created by the sudden block of blood flow reversal and the resulting vibrations in the heart's walls and surrounding blood . The "Lub" (First Heart Sound, S1) what causes the lub dub sound of your heartbeat
Here’s the shift:
The vibration of these two valves closing creates the dub sound.