Where Is The S2 Sound Auscultated

Where is the S2 sound heard best?

A2 is best heard at the aortic area (second right intercostal space); P2 is best heard at the pulmonary area. S2 is a high-pitched sound heard best with the diaphragm of the stethoscope.

Where can I Auscultate S1 and S2?

Listen over the aortic valve area with the diaphragm of the stethoscope. This is located in the second right intercostal space, at the right sternal border (Figure 2). When listening over each of the valve areas with the diaphragm, identify S1 and S2, and note the pitch and intensity of the heart sounds heard.

Where does S2 sound come from?

The second heart sound (S2) represents closure of the semilunar (aortic and pulmonary) valves (point d). S2 is normally split because the aortic valve (A2) closes before the pulmonary valve (P2).

Where are the heart sounds Auscultated?

- Pulmonary area - left second intercostal space, just lateral to the sternum. This is the area where sounds from the pulmonary valve are best auscultated; - Aortic area - right second intercostal space, just lateral to the sternum. This is where the aortic valve sounds are best auscultated.

Where is S2 louder than S1?

Normally, S1 is louder than S2 at the apex, and softer than S2 at the base of the heart. Pathologic changes in the intensity of S1 relative to S2 may be seen in certain disease states. When evaluating the intensity of S2, note the relative intensity of the aortic component (A2) and the pulmonic component (P2).

Does mitral valve stenosis cause pulmonary hypertension?

Like other heart valve problems, mitral valve stenosis can strain your heart and decrease blood flow. Untreated, mitral valve stenosis can lead to complications such as: High blood pressure in the lung arteries (pulmonary hypertension).

Which heart sound is the loudest sound when Auscultated?

Normally the first (S1) and second (S2) heart sounds are loudest and are audible in all normal animals. S1 is audible at the onset of mechanical systole and occurs in association with closure of the atrioventricular valves. S2 is heard at the end of systole with closure of the semilunar valves (see Fig.

What causes the mitral valve to close?

The valve opens and closes because of pressure differences, opening when there is greater pressure in the left atrium than ventricle and closing when there is greater pressure in the left ventricle than atrium.

Where is S1 best Auscultated?

The standard listening posts (aortic, pulmonic, tricuspid and mitral) apply to both heart sounds and murmurs. For example, the S1 heart sound — consisting of mitral and tricuspid valve closure — is best heard at the tricuspid (left lower sternal border) and mitral (cardiac apex) listening posts.

When is S2 heard?

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.

How can you tell S1 and S2 heart sounds?

The 2nd hear sound, S2 (dub), marks the end of systole (beginning of diastole).

1. Auscultate the heart at various sites.

S1 S2
Just precedes carotid pulse Follows carotid pulse
Louder at apex Louder at base
Lower pitch and longer than S2 Higher pitch and shorter than S2
Because systole is shorter than diastole:

What action causes the second heart sound heard through a stethoscope?

what action causes the second heart sound heard through a stethoscope? closing of the semilunar and blood hitting against the valves .

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