The nurse is auscultating heart sounds on a client and hears an extra sound late in diastole, just before the S1. How should the nurse document this finding?

The third heart sound (S3)

A friction rub

The fourth heart sound (S4)

A split second heart sound S2

Answer and Explanation

The Correct Answer is A

A. The third heart sound (S3):

The third heart sound (S3) is an abnormal heart sound that occurs during early diastole, immediately after S2 (the second heart sound). It is caused by the rapid filling of the ventricles and is often associated with conditions like heart failure. In heart failure, the ventricles become stiff, causing vibrations that produce the S3 sound.

B. A friction rub:

A friction rub is a high-pitched, scratchy sound heard during both systole and diastole. It is caused by the rubbing together of inflamed pericardial layers (pericarditis) and is usually heard best at the left lower sternal border. Friction rubs can indicate pericardial inflammation and are often heard in conditions such as pericarditis or after a myocardial infarction.

C. The fourth heart sound (S4):

The fourth heart sound (S4) occurs late in diastole, just before S1, and is caused by atrial contraction. It is associated with increased resistance to ventricular filling, often due to conditions like hypertension or aortic stenosis. The S4 sound is heard as a low-pitched "atrial gallop."

D. A split second heart sound S2:

The second heart sound (S2) represents the closure of the aortic and pulmonic valves. Normally, S2 has two components: A2 (aortic valve closure) and P2 (pulmonic valve closure). A split S2 occurs when A2 and P2 do not close simultaneously. A physiological split S2 is common during inspiration and occurs due to delayed closure of the pulmonic valve. An abnormal or fixed split S2 can indicate underlying heart conditions such as atrial septal defect (ASD) or right bundle branch block (RBBB).

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Correct Answer is D

Explanation

A. The eyes converge to focus on the light.

This statement refers to the convergence reflex, where both eyes move medially (towards each other) to maintain single binocular vision when focusing on a near object. It is not related to the pupillary light reflex, which involves changes in pupil size in response to light.

B. The eye focuses the image in the center of the pupil.

This choice does not accurately describe the pupillary light reflex. The pupillary light reflex involves constriction of the pupil in response to light, not focusing an image in the center of the pupil.

C. Dilation of both pupils occurs in response to bright light.

This statement is incorrect. In response to bright light, the pupils should constrict, not dilate. Dilation of pupils in bright light could indicate an abnormal response, such as in cases of certain neurological conditions or drug use.

D. Constriction of both pupils occurs in response to bright light.

This choice is correct. In the pupillary light reflex, both pupils constrict when exposed to bright light. This response is a protective mechanism to prevent excessive light from entering the eyes, ensuring optimal visual acuity.

A. Fifth left intercostal space at the midclavicular line B. Third left intercostal space at the midclavicular line C. Fourth left intercostal space at the sternal border D. Under the left breast at the midclavicular line

Correct Answer is A

Explanation

A. Fifth left intercostal space at the midclavicular line:

Explanation: The apical pulse, or the point of maximal impulse (PMI), is typically located at the fifth intercostal space at the midclavicular line on the chest. This is the area where the heartbeat is best heard using a stethoscope in most adults.

B. Third left intercostal space at the midclavicular line:

Explanation: This location is too high for the apical pulse. The heart's apex is generally not found at the third intercostal space; it's lower, closer to the fifth intercostal space.

C. Fourth left intercostal space at the sternal border:

Explanation: This location is not the typical site for auscultating the apical pulse. The PMI is usually heard at the midclavicular line, not at the sternal border.

D. Under the left breast at the midclavicular line:

Explanation: This position is not precise enough for auscultating the apical pulse. The specific intercostal space (fifth) and midclavicular line are crucial for accurate assessment.

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The nurse is auscultating heart sounds on a client and hears an extra sound late in diastole, just before the S1. How should the nurse document this finding?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

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Correct Answer is D

Explanation

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Correct Answer is A

Explanation

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