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It's the sound of the blood hitting the walls of the valves as they close. That is pretty much the most basic way to explain it.
The first heart sound a low pitched "lubb it is caused by vibration of the AV valves and surrounding fluid as the valves close at the begining of ventricular systole and the 2nd heart sound "dub" results from the closure of the aortic and pulmonary semilunar valves at the begining of ventricle diastole.
The lub-dub sound is caused by the opening and closing of valves in the heart.
The lub sound is caused by the shutting of the bicuspid/mitral valve and the tricuspid valve. This occurs when blood from the atrial chambers enter the ventricles.
The dub sound is caused by the shutting of the aortic valve and the pulmonary valve. This occurs when the blood from the ventricles are pumped out into the lungs and the rest of the body.
This cycle will then repeat itself hence the constant lub-dub lub-dub lub-dub etc
The answer to that question is actually quite simple. I don't know if what you are asking is why does it make a thumping sound?? But if that is the case then I can answer that question. The sound you hear is the heart producing blood and circulating it throughout the body.
Hope that helps....
The 'lub' is the S1 sound. It occurs due to normal closure of the mitral and tricuspid (atrioventricular) valves. With these valves closed, systole commences and blood is actively squeezed from the ventricles. The second sound is the 'dub' or S2 sound. It occurs as the aortic (to LV) and pulmonary (to RV) valves close to prevent backflow from the blood ejected from the ventricles and marks the beginning of diastole (or filling) of the heart.
The "lubb" sound is produced when the atrioventricular valves in the heart close. These valves are deep inside the heart and are between the upper (atrial) and lower (ventricular) chambers. The "dupp" sound is created when the semilunar valves (aortic and pulmonary) close.
These valves are at the top of the heart and lead to the arteries that carry blood to either the lungs or the body. The "lubb" is the first heart sound and softer. The "dupp" sound is shorter and louder than the "lubb" sound. This is because the cusps of the semilunar valves are more rigid than the atrioventricular valves (mitral and tricuspid).
The closing of the heart valves.
Blood pumping through.
What else can I help you with?
What is the Medical term meaning listening to the heart?
Cardiac auscultation is the medical term meaning listening to the heart.
When was No Sound But a Heart created?
No Sound But a Heart was created in 1987.
Why is it important to know the location of the heart?
applying leads for ECG cardiopulmonary resuscitation listening to heart sounds
What is the word that describes the sound of the heart beating?
The sound of a heart beat is usually described as a thump.
What are the heart chambers that are filled when you hear the first heart sound?
after the first heart sound is made ventricles starts emptying.
What causes the sounds that are normally heard when listening to the heart through a stethoscope?
The sound is caused by the closing of valves in the heart.
What is an abnormal sound heard when listening to the heart or neighboring large blood vessels?
heart murmur
What is the Medical term meaning listening to the heart?
Cardiac auscultation is the medical term meaning listening to the heart.
How do you get sound from radio?
by listening to it!
Does One's heart rate increase during listening to house music?
your heart rate raises when listening to "loud" music...
How do we use sound daily?
by listening
How is mitral insufficiency diagnosed?
A diagnosis of mitral insufficiency requires a detailed patient history. Listening to the heart (auscultation) reveals the presence of a third heart sound. Chest x ray and ECG provide additional information.
When was No Sound But a Heart created?
No Sound But a Heart was created in 1987.
When was Sound of My Heart created?
Sound of My Heart was created in 1989.
What heart sound is stronger at the apex of the heart?
First heart sound S1-LUB
What is the LUBDUB sound we hear when listening to the heart?
The "LUB" sound is created by the closing of the mitral and tricuspid valves during systole as blood is pumped out of the ventricles. The "DUB" sound is caused by the closing of the aortic and pulmonary valves during diastole as the ventricles relax and fill with blood. Together, these sounds represent the normal functioning of the heart's valves during the cardiac cycle.
What does the beating sound of your heart come from?
The sound of a heart beat is caused by the closing of the valves in the heart.
