The nurse is reviewing the sequence of the cardiac cycle. The nurse recognizes that the electrical stimulus of the cardiac cycle follows which sequence?

AV node-SA node bundle of His- bundle branches

SA node- AV node-bundle of His -bundle branches

Bundle of His- AV node- SA node- Erb's Point

AV node-SA node-bundle of His- Erb's Point

Answer and Explanation

The Correct Answer is B

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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Correct Answer is D

Explanation

A. Perform the confrontation test:

The confrontation test is a basic visual field screening test. It assesses the peripheral vision by having the patient cover one eye and the examiner covers the opposite eye. The patient and the examiner then bring their fingers into the visual field from the periphery, and the patient indicates when they see the fingers.

B. Ask the patient to read the print on a handheld Jaeger card:

Jaeger cards are used for near vision testing. The patient reads progressively smaller print to assess their near vision acuity.

C. Determine the patient's ability to read newsprint at a distance of 12 to 14 inches:

This method assesses near vision. It is often used informally in clinical settings, where the patient is asked to read a newspaper or similar print at a comfortable reading distance.

D. Use the Snellen chart positioned 20 feet away from the patient:

The Snellen chart is a standardized chart used for visual acuity testing. It is placed 20 feet away from the patient, and the patient is asked to read the letters or symbols on the chart with one eye covered at a time.

A. Checks the instrument gauge to ensure the reading starts at zero B. Centers the cuff bladder over the client's brachial artery C. Places the client's arm above the level of the client's heart D. Wraps the blood pressure cuff around the client's arm using firm pressure

Correct Answer is C

Explanation

A. Checks the instrument gauge to ensure the reading starts at zero:

This action is correct. Before taking a blood pressure reading, it's essential to ensure that the instrument's gauge starts at zero. This ensures accurate measurement as the reading reflects the pressure above zero.

B. Centers the cuff bladder over the client's brachial artery:

This action is correct. Proper placement of the blood pressure cuff over the brachial artery is crucial for accurate readings. Centering the cuff ensures that the artery is correctly compressed for measurement.

C. Places the client's arm above the level of the client's heart:

This action is incorrect. Placing the arm above heart level can result in a falsely low blood pressure reading. The arm should be at the same level as the heart to obtain an accurate measurement.

D. Wraps the blood pressure cuff around the client's arm using firm pressure:

This action is correct, but it's important to note that while the cuff should be snug, it should not be too tight or too loose. Wrapping the cuff with firm, even pressure ensures proper compression of the artery for an accurate measurement.

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The nurse is reviewing the sequence of the cardiac cycle. The nurse recognizes that the electrical stimulus of the cardiac cycle follows which sequence?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

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Correct Answer is D

Explanation

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Correct Answer is C

Explanation

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