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
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Hyperkalemia can lead to dangerous cardiac arrhythmias and other heart-related complications due to its effect on the electrical conduction system of the heart, making cardiac assessment the priority.
B. While neurological assessment is important in various conditions, it is secondary to assessing cardiac status in hyperkalemia.
C. Gastrointestinal symptoms can occur with hyperkalemia, but they do not pose an immediate life-threatening risk like cardiac issues do.
D. Respiratory assessment is essential in many contexts, but the immediate threat of hyperkalemia lies in its impact on heart function, making cardiac assessment the most critical.
Correct Answer is C
Explanation
A. Discontinuing pain medication may not be appropriate, as it can lead to inadequate pain management for the patient. Pain management is crucial for terminally ill patients.
B. While abdominal massage may help relieve mild constipation, it is not a reliable primary intervention for more severe constipation caused by medication.
C. Laxatives are commonly prescribed for constipation related to pain medication and are an effective method to promote bowel movements, making this the best choice.
D. Administering enemas twice daily can be excessive and may cause discomfort or lead to dependency, making this option less favorable than using laxatives.
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