The nurse is teaching a group of staff nurses about cardiac rhythms. The nurse would indicate that a U wave may indicate which of the following?

Hypokalemia

Hypercalcemia

Hyponatremia

Hyperkalemia

Answer and Explanation

The Correct Answer is A

A. Hypokalemia: U waves are often seen on an electrocardiogram in clients with hypokalemia. They represent delayed repolarization of the Purkinje fibers due to low potassium levels.

B. Hypercalcemia: Hypercalcemia affects the QT interval, typically shortening it, but it does not cause U waves.

C. Hyponatremia: Electrocardiographic changes are not commonly associated with hyponatremia.

D. Hyperkalemia: Hyperkalemia causes peaked T waves, prolonged PR intervals, and wide QRS complexes, not U waves.

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Correct Answer is C

Explanation

A. Deficits in the right visual field: This would be associated with a left-sided stroke, as the right hemisphere controls the left visual field.

B. Motor retardation: This is not a specific sign of right hemisphere stroke. It might be seen with other types of strokes.

C. Poor impulse control: A right hemisphere stroke may cause behavioral changes, including impulsivity, poor judgment, and difficulty in regulating emotions.

D. Unable to discriminate words and letters: This would suggest aphasia, which is typically associated with left hemisphere damage, as the left hemisphere controls language.

A. A client with left-sided heart failure on oxygen via nasal cannula B. A client with syncope who is being discharged today C. A client scheduled for a cardiac ultrasound this morning D. A client with controlled atrial fibrillation with a heart rate of 82

Correct Answer is A

Explanation

A. A client with left-sided heart failure on oxygen via nasal cannula: This client is at risk for respiratory distress due to pulmonary congestion. Immediate assessment is needed to ensure oxygenation and manage potential deterioration.

B. A client with syncope who is being discharged today: This client is stable if being discharged, so assessment can be delayed.

C. A client scheduled for a cardiac ultrasound this morning: This is a non-urgent diagnostic procedure and does not take priority.

D. A client with controlled atrial fibrillation with a heart rate of 82: Controlled atrial fibrillation indicates stability, so this client can be assessed later.

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The nurse is teaching a group of staff nurses about cardiac rhythms. The nurse would indicate that a U wave may indicate which of the following?

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Naxlex Comprehensive Predictor Exams

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Explanation

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Explanation

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