If a review doesn't mention what goes wrong, it isn't complete. If a valve doesn't close tightly (regurgitation) or doesn't open wide enough (stenosis), the blood creates turbulence—a "sloshing" or "whooshing" sound called a . Instead of a clean "Lub-Dub," you might hear a "Lub-Whoosh-Dub."
The familiar "lub-dub" sound isn't the heart muscle contracting, nor is it blood simply sloshing around. It is the sound of . why does the heart make a lub dub sound
Think of it like clapping your hands: the sound isn't from the movement itself, but from the instant two surfaces meet. In the heart, that meeting is the forceful closure of valves designed to keep blood flowing in one direction. If a review doesn't mention what goes wrong,
: Closing these valves prevents blood from flowing backward into the upper chambers (atria). It is the sound of
: S1 is typically lower-pitched, duller, and longer-lasting than the second sound. The Second Sound: "Dub" (S2)
When the ventricles (the bottom chambers) squeeze to push blood out to the body and lungs, the pressure inside them skyrockets. To stop the blood from pushing back up into the atria (the top chambers), the valves between them snap shut.