0
The second heart sound occurs as a result of valve closure due to?
Wiki User
∙ 9y ago
The second heart sound, also called S2, is a result of the closing of the aortic and pulmonic valves. The heart sounds are described as sounding like "lub-dub".
Wiki User
∙ 9y ago
Add your answer:
Earn +20 pts
Why does the second heart sound occur after the T wave?
The second heart sound (S2) occurs after the T wave because it corresponds to the closure of the aortic and pulmonic valves in the heart. The T wave represents ventricular repolarization, which happens after ventricular contraction and ejection of blood through the aortic and pulmonic valves. The closure of these valves generates the S2 sound.
Would turbulence of blood flow through the aortic valve give rise to the first heart sound?
No. The heart sounds are caused by the closure of heart valves. The first heart sound is caused by the closure of the AV valves (tricuspid and mitral). The second heart sound is the result of the closure of the aortic and pulmonic valve after the completion of systole. Turbulence of blood flow through the aortic valve would cause a murmur (an abnormal heart sound) during systole.
What parts of the heart make the beating sound?
The first heart sound, the so called "lub", comes from the closure of the atrioventricular valve. The second heart sound, the "dup", comes from the closure of the semilunar valve.
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 is the origin of heart sounds?
Heart sounds originate from the closure of heart valves during the cardiac cycle. The first heart sound (S1) is produced by the closure of the mitral and tricuspid valves, while the second heart sound (S2) is caused by the closure of the aortic and pulmonary valves. These sounds can be heard using a stethoscope during a physical examination.
The second heart sound is caused by?
Closure of the two atrioventricular valves, specifically the tricuspid and mitral valves.
Why do heart beats sound like 2 quick beats?
The beats are caused by the valves in the heart closing. The first beat occurs when the ventricles contract. The pressure in them increases, so the atrioventricular valves close. The second beat occurs when the ventricles relax. As the pressure decreases, blood is sucked back from the aorta and pulmonary artery causing the semi lunar valves to close.
What is the difference between lub and dub?
"Lub" refers to the first heart sound (S1) caused by the closure of the atrioventricular valves during ventricular contraction, while "dub" refers to the second heart sound (S2) caused by the closure of the semilunar valves during ventricular relaxation. Together, lub-dub represents a complete cardiac cycle.
The first sound of a cardiac cycle occurs when?
closure of the mitral and tricuspid valves.
What is the sound of second heart sound?
The second heart sound (S2) is a short burst of auditory vibrations of varying intensity, frequency, quality, and duration. It has two audible components, the aortic closure sound (A2) and the pulmonic closure sound (P2), which are normally split on inspiration and virtually single on expiration. S2 is produced in part by hemodynamic events immediately following closure of the aortic and pulmonic valves. The vibrations of the second heart sound occur at the end of ventricular contraction and identify the onset of ventricular diastole and the end of mechanical systole.
The second heart sound results from vibrations generated by the .?
closure of the aortic and pulmonary valves at the beginning of diastole.
Prolonged heart sound caused by incomplete closure of heart valves?
murmur
