The nurse is teaching a beginning ECG class to staff nurses. As the nurse begins to discuss the parts of the ECG complex, one of the students asks what the normal order of conduction through the heart is. The correct response would be which of the following?

SA node, AV node, bundle of His, right and left bundle branches, and the Purkinje fibers

SA node, AV node, bundle of His, the Purkinje fibers, and the right and left bundle branches

AV node, SA node, bundle of His, right and left bundle branches, and the Purkinje fibers

SA node, AV node, right and left bundle branches, bundle of His, and the Purkinje fibers

Answer and Explanation

The Correct Answer is A

A. This is the correct sequence of normal electrical conduction through the heart: the impulse originates in the sinoatrial (SA) node, travels to the atrioventricular (AV) node, then to the bundle of His, down the right and left bundle branches, and finally through the Purkinje fibers.
B. This choice places the Purkinje fibers before the bundle branches, which is incorrect.
C. The AV node does not initiate conduction; the SA node is the natural pacemaker of the heart.
D. This sequence incorrectly places the bundle branches before the bundle of His.

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Correct Answer is B

Explanation

A. Airway: Ensure the airway is open.
B. Breathing: Provide rescue breaths if the person is not breathing.
C. Circulation: Begin chest compressions to maintain blood flow.
D. Defibrillation: Use an automated external defibrillator (AED) as soon as it's available, especially in cases of shockable rhythms like ventricular fibrillation.

A. Serum sodium levels B. Daily weight C. Hourly urine output D. 24-hour intake and output

Correct Answer is C

Explanation

A. Serum sodium levels are important to monitor over time with diuretic therapy but do not provide immediate feedback on the effect of a bolus dose of furosemide.
B. Daily weight helps assess long-term fluid status but is not helpful for evaluating an acute response.
C. Hourly urine output is the most appropriate and immediate measure to assess the effectiveness of a bolus dose of IV furosemide, especially in a critically ill client with acute pulmonary edema.
D. 24-hour intake and output provides a broader picture but does not offer real-time assessment like hourly output does.

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The nurse is teaching a beginning ECG class to staff nurses. As the nurse begins to discuss the parts of the ECG complex, one of the students asks what the normal order of conduction through the heart is. The correct response would be which of the following?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

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Correct Answer is B

Explanation

Correct Answer is C

Explanation

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