A nurse is listening to the heart sounds of a client. What information about S2 sounds should the nurse recognize as accurate?

S2 indicates the beginning of diastole

S2 coincides with the carotid artery pulse

S2 is caused by the closure of the semilunar valves

S2 is louder than an S1

Answer and Explanation

The Correct Answer is C

A) S2 indicates the beginning of diastole:
While S2 does coincide with the end of systole and the beginning of diastole, this statement is not the most specific or accurate way to describe the S2 heart sound. S2 marks the closure of the semilunar valves (the aortic and pulmonic valves), which occurs at the end of systole, just before diastole begins. While it is true that the S2 sound occurs as the heart transitions from systole to diastole, the closure of the semilunar valves is the more specific cause of S2.

B) S2 coincides with the carotid artery pulse:
This statement is not accurate. S2 does not exactly coincide with the carotid pulse. The S2 sound is heard slightly after the pulse due to the time it takes for the mechanical contraction of the heart to produce the sound. The carotid pulse typically corresponds more closely with the closure of the atrioventricular (AV) valves and the beginning of systole (S1), not S2. The timing of S2 and the carotid pulse can be close, but they are not perfectly synchronized.

C) S2 is caused by the closure of the semilunar valves:
This is the correct explanation. S2 is the heart sound produced by the closure of the semilunar valves (the aortic and pulmonic valves). The closing of these valves marks the end of systole and the beginning of diastole. S2 is typically described as having two components: the A2 sound (closure of the aortic valve) and the P2 sound (closure of the pulmonic valve). In some cases, particularly during inspiration, A2 and P2 may be heard separately, producing a split S2 sound.

D) S2 is louder than an S1:
This statement is not accurate. In general, S1 is louder than S2 at the apex of the heart (the lower part of the chest). S2 is louder than S1 at the base of the heart (near the sternum), particularly over the aortic and pulmonic areas. The loudness of heart sounds varies based on the location of auscultation, but it is not universally true that S2 is always louder than S1. The intensity of each sound depends on various factors, including the position of the listener and the health of the heart valves.

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Correct Answer is C

Explanation

A) The best time to perform BSE is immediately prior to the menstrual cycle:
Performing a breast self-examination (BSE) immediately prior to the menstrual cycle is not ideal because hormonal changes leading up to menstruation can cause the breasts to become swollen, tender, and lumpy. These changes could make it difficult to detect subtle lumps or changes in the breast tissue. For the most accurate assessment, it's recommended that women avoid performing BSE during the premenstrual phase when the breast tissue is most likely to be affected by hormonal fluctuations.

B) If pregnancy is suspected, BSE should not be performed until post-delivery:
This statement is incorrect. There is no contraindication to performing a breast self-examination during pregnancy, and it is important for pregnant women to continue self-monitoring for any changes in breast tissue. In fact, BSE should be performed regularly during pregnancy, as the breast tissue can undergo changes due to hormonal shifts, and early detection of any abnormalities is key to successful management.

C) The best time to perform BSE is 4 to 7 days after the first day of the menstrual period:
This is the correct recommendation. The best time to perform a BSE is 4 to 7 days after the first day of the menstrual period because the breasts are least likely to be swollen or tender during this time. Hormonal levels are more stable at this point in the menstrual cycle, and any lumps or changes in the tissue are more likely to be noticeable. Performing BSE during this time increases the likelihood of detecting potential abnormalities.

D) The woman with diagnosed fibrocystic breast tissue should not rely on BSE:
While it is true that women with fibrocystic breast changes may experience lumpy, tender tissue, they should still perform BSE regularly. Fibrocystic tissue can sometimes make it more difficult to distinguish between normal and abnormal changes, but BSE remains an important tool for detecting significant changes, such as new lumps or changes in size, shape, or consistency. Women with fibrocystic breast tissue should be taught to perform BSE regularly and to report any unusual changes to their healthcare provider. Relying solely on BSE for breast cancer detection is not recommended, but it is an essential part of breast health awareness.

A. Listening for sounds from the apex to the heart to the base of the heart. B. Listening to the sounds at the site where the apical pulse is heard to be the loudest. C. Listening from the base of the heart across and down, then over to the apex. D. Listening to the sounds at the aortic, tricuspid, pulmonic, arid mitral areas.

Correct Answer is D

Explanation

A) Listening for sounds from the apex to the heart to the base of the heart: This technique is not the most effective for auscultation of heart sounds. While it may seem logical to start at the apex and move toward the base, heart sounds are best heard at specific anatomical locations where the valves are closest to the chest wall. Moving from apex to base does not follow the traditional systematic approach used to assess all heart sounds.

B) Listening to the sounds at the site where the apical pulse is heard to be the loudest: The apical pulse is typically located at the mitral area (left 5th intercostal space, midclavicular line), and while this is an important location for assessing heart sounds, it is not the recommended approach for auscultation. The nurse should listen to all the key valve areas to fully assess the heart's function and detect abnormalities such as murmurs or extra heart sounds.

C) Listening from the base of the heart across and down, then over to the apex: This approach is not systematic and may cause the nurse to miss important sounds in the other areas of the heart. The base of the heart is located at the top (around the second intercostal space), while the apex is at the bottom (left 5th intercostal space). A more structured method of auscultation is required to ensure all key areas are evaluated.

D) Listening to the sounds at the aortic, tricuspid, pulmonic, and mitral areas: This is the correct technique for auscultating heart sounds. The nurse should listen over the aortic, pulmonic, tricuspid, and mitral valve areas in sequence to assess heart sounds thoroughly. Each of these areas is associated with a specific valve, and auscultation at these locations helps the nurse identify any abnormal heart sounds, such as murmurs, S3, or S4, as well as the timing of S1 and S2 heart sounds. This systematic approach ensures a comprehensive assessment of heart function.

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A nurse is listening to the heart sounds of a client. What information about S2 sounds should the nurse recognize as accurate?

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Correct Answer is C

Explanation

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Correct Answer is D

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