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Isovolumetric relaxation: In this phase the ventricles relax, the intraventricular pressure decreases. When this occurs, a pressure gradient reversal causes the aortic and pulmonary valves to abruptly close (aortic before pulmonary), causing the second heart sound. Isovolumetric relaxation: In this phase the ventricles relax, the intraventricular pressure decreases. When this occurs, a pressure gradient reversal causes the aortic and pulmonary valves to abruptly close (aortic before pulmonary), causing the second heart sound.
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∙ 15y ago
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∙ 14y agoSemilunar Valves
In a normal adult, there are two normal heart sounds associated with the heartbeat.
These heart sounds are often described as a "lub" and "dub".
The first heart sound is produced by the closing of the AV (atrioventricular) valves.
The second heart sound is produced by the closing of the semilunar valves.
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∙ 12y agoThe second heart sound is caused by the semilunar valves closing during isovolumetric relaxation.
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∙ 14y agoThe second sound of the heartbeat is called DUBB (S2) where the blood turbulence associated with the closer of semilunar valves at the begining of ventricular diastole
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∙ 14y agoThe second heart sound "dub" is the closing of the semilunar valves during the ejection phase.
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∙ 13y agosemilunar valves
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∙ 11y agothe mitral valve
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∙ 11y agothump
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What are you hearing when your heart beats?
The bicuspid, tricuspid and semilunar valves snapping shut to prevent blood flowing backwards. Bicuspid and tricuspid valves produce the "lub" sound and the semilunar valves produce the "dub" sound.
What produces the systolic korotkoff sound?
The first Korotkoff sound is the sound produced by the turbulence of the AV (atrioventricular valves) closing specifically the tricuspid and mitral valves. The second Korotkoff sound is produced by the closure of the aortic and pulmonary valves. You can hear a splitting of the second heart sound in a highly efficient heart.
How is a heart beat produced?
The heart beat, also called heart sounds, is produced by the closing of the valves. The valves produce two sounds, known as lub-dub. The atrioventricular valve closing produces the first sound, or lub, and the semilunar valve closing produces the second sound, or dub.
What valve causes the second heart sound?
The closing of the mitral and tricuspid valves results in the first heart sound. The closing of the aortic and pulmonic valves results in the second heart sound.AV valve
The second heart sound is caused by?
Closure of the two atrioventricular valves, specifically the tricuspid and mitral valves.
Which heart sound results from the AV valves closing?
S2, also called the second heart sound, or "dub" when characterized by the sound lub-dub.
What causes the lubb dupp heart sounds that are heard while taking a apical pulse?
The closure of mitral and tricuspid valves causes the first heart sound. The second heart sound is produced by the closure of semilunar valves (pulmonic and aortic valves).
What cause the lubb-dupp heart sounds that are heard while talking an apical pulse?
The closing of the valves in the heart. The first sound is caused by the closing of the atrioventricular valves within the heart. The second sound is caused by the shutting of the aortic and pulmonary valves.
What causes the sound of someone's heart beat?
the closing up of the tricuspid and bicuspid valves produce the ' lub' sound while closing up of semi lunar valves produse the ' dub ' sound
What does a healthy heart sound?
In healthy adults, there are two normal heart sounds often described as a lub and a dub, that occur in sequence with each heart beat. These are the first heart sound (S1) and second heart sound (S2), produced by the closing of the AV valves and semilunar valves respectively.
Which part of the heart makes the heartbeat sound?
A heartbeat produces the familiar "LUB-DUP" sounds as the chambers contract and the valves close. The first heart sound, "lub," is heard when the ventricles contract and the atrioventricular valves close. This sound last longest and has a lower pitch. The second heart sound, "dub," is heard when the relaxation of the ventricles allows the semilunar valves to close.
The second heart sound results from vibrations generated by the .?
closing of the semilunar valves at the start of diastole
