A nurse is reviewing the electrocardiogram (ECG) results. Which portion of the conduction system does the nurse consider when evaluating the P wave?

SA node

AV node

Bundle of His

Purkinje fibers

Answer and Explanation

The Correct Answer is A

A. The P wave represents atrial depolarization, which is initiated by the SA node, the heart's natural pacemaker.
B. The AV node is responsible for conducting impulses from the atria to the ventricles but does not initiate the P wave.
C. The Bundle of His transmits the electrical impulses to the ventricles but is not directly associated with the P wave.
D. Purkinje fibers are involved in ventricular depolarization, which corresponds to the QRS complex, not the P wave.

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Correct Answer is D

Explanation

A. An increase in heart rate does not directly affect hemoglobin levels; this option is incorrect.
B. A higher heart rate decreases diastolic filling time, as there is less time for the heart to fill between beats, which can lead to reduced stroke volume.
C. An increased heart rate does not inherently increase stroke volume; in fact, at very high rates, stroke volume can decrease due to reduced filling time.
D. The significant increase in heart rate to 164 beats/min can lead to decreased cardiac output due to compromised diastolic filling and reduced stroke volume.

A. Health promotion B. Risk C. Problem focused D. Collaborative problem

Correct Answer is A

Explanation

A. "Readiness for enhanced urinary elimination" is classified as a health promotion diagnosis, indicating the patient’s desire to improve their health condition and adopt new health behaviors.
B. A risk diagnosis is used when there is a potential for problems to occur, not applicable in this scenario as the patient is actively seeking improvement.
C. A problem-focused diagnosis describes an existing problem that requires intervention; this situation reflects readiness for improvement, not an existing issue.
D. A collaborative problem involves potential complications that require both nursing and medical management; this case focuses on the patient's willingness to learn a self-management skill rather than managing a specific medical problem.

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A nurse is reviewing the electrocardiogram (ECG) results. Which portion of the conduction system does the nurse consider when evaluating the P wave?

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Naxlex Comprehensive Predictor Exams

A patient's heart rate increased from 94 to 164 beats/min. What will the nurse expect as a result?

Correct Answer is D

Explanation

Correct Answer is A

Explanation

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