The nurse is listening to the heart sounds of a client. The nurse recognizes that the S2:

Indicates the beginning of diastole

Coincides with the carotid artery pulse

is louder than an S1

Is caused by the closure of the semilunar valves

Answer and Explanation

The Correct Answer is D

A. Indicates the beginning of diastole: This statement is not accurate. S2, the second heart sound, indicates the end of systole and the beginning of diastole. It is specifically associated with the closure of the aortic and pulmonary valves.

B. Coincides with the carotid artery pulse: This statement is not accurate. S2 is associated with the closure of the aortic and pulmonary valves in the heart, not with the carotid artery pulse.

C. Is louder than an S1: This statement is not accurate. S1, the first heart sound, is usually louder than S2. S1 is associated with the closure of the mitral and tricuspid valves and marks the beginning of systole.

D. Is caused by the closure of the semilunar valves: This statement is accurate. S2 is caused by the closure of the aortic and pulmonary valves, which are the semilunar valves in the heart. It marks the end of systole and the beginning of diastole.

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Correct Answer is C

Explanation

A. Friction rub:

A friction rub is a grating or rubbing sound or sensation heard or felt during auscultation or palpation. It occurs when inflamed pleural or pericardial surfaces rub against each other during breathing or heartbeats, respectively.

B. Tactile fremitus:

Tactile fremitus refers to the palpable vibrations transmitted through the bronchopulmonary tree to the chest wall as the patient speaks. It is assessed by placing hands on the patient's back while the patient speaks certain words. Increased tactile fremitus can occur in conditions with lung consolidation, such as pneumonia.

C. Crepitus:

Crepitus is a crackling or grating sensation felt under the skin or heard when the ends of a broken bone rub against each other. It can also occur when air leaks into subcutaneous tissue, leading to a crackling sensation upon palpation.

D. Adventitious sounds:

Adventitious sounds refer to abnormal lung sounds heard during auscultation. These sounds include crackles (rales), wheezes, rhonchi, and pleural friction rubs. Adventitious sounds can indicate various respiratory conditions, such as pneumonia, bronchitis, or asthma.

A. AV node-SA node bundle of His- bundle branches B. SA node- AV node-bundle of His -bundle branches C. Bundle of His- AV node- SA node- Erb's Point D. AV node-SA node-bundle of His- Erb's Point

Correct Answer is B

Explanation

A. AV node - SA node - bundle of His - bundle branches:

This sequence is incorrect. The SA node (sinoatrial node) initiates the electrical impulse in the heart, followed by the AV node (atrioventricular node), bundle of His, and then the bundle branches.

B. SA node - AV node - bundle of His - bundle branches:

This sequence is correct. The electrical stimulus of the cardiac cycle starts at the SA node, which is the natural pacemaker of the heart. From the SA node, the impulse travels to the AV node, then to the bundle of His, and finally to the bundle branches, which distribute the impulse to the ventricles, causing them to contract.

C. Bundle of His - AV node - SA node - Erb's Point:

This sequence is incorrect. Erb's Point is a point on the chest where heart sounds S2 and S3 can be heard most distinctly.

D. AV node - SA node - bundle of His - Erb's Point:

This sequence is incorrect. The AV node comes after the SA node in the electrical conduction system of the heart. Erb's Point is not a part of the normal cardiac conduction pathway; it is a location for auscultation on the chest.

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The nurse is listening to the heart sounds of a client. The nurse recognizes that the S2:

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Naxlex Comprehensive Predictor Exams

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Correct Answer is C

Explanation

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Correct Answer is B

Explanation

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