When these valves slam shut, they create vibrations in the surrounding blood and heart tissue. Your ears (or a stethoscope) detect these vibrations as sound.
Here is a deep dive into the mechanics behind the "lub-dub" and what that rhythm tells us about the health of the body’s most vital organ.
The (the S2 sound ) marks the end of systole and the beginning of diastole —the resting/filling phase.
It is caused by the simultaneous closure of the mitral and tricuspid valves (the atrioventricular valves).
The first sound, the lower-pitched and longer lub , occurs at the beginning of ventricular contraction (systole).
So the next time you feel your pulse or hear your heart in a quiet room, remember: You aren't hearing a muscle pump. You are hearing the thunderous, synchronized slam of four biological doors, closing with millisecond precision to keep you in the rhythm of life.
When these valves slam shut, they create vibrations in the surrounding blood and heart tissue. Your ears (or a stethoscope) detect these vibrations as sound.
Here is a deep dive into the mechanics behind the "lub-dub" and what that rhythm tells us about the health of the body’s most vital organ.
The (the S2 sound ) marks the end of systole and the beginning of diastole —the resting/filling phase.
It is caused by the simultaneous closure of the mitral and tricuspid valves (the atrioventricular valves).
The first sound, the lower-pitched and longer lub , occurs at the beginning of ventricular contraction (systole).
So the next time you feel your pulse or hear your heart in a quiet room, remember: You aren't hearing a muscle pump. You are hearing the thunderous, synchronized slam of four biological doors, closing with millisecond precision to keep you in the rhythm of life.