A nurse is caring for a client who has a serum potassium level of 5.9 mEq/L. The provider prescribes polystyrene sulfonate. If this medication is effective, the nurse should expect which of the following changes on the client's ECG?

Prolonged PR intervals

Widening QRS Complex

A reduction of a peaked T wave

An increase in T wave amplitude

Answer and Explanation

The Correct Answer is C

Choice A rationale: Prolonged PR intervals are not typically associated with the use of polystyrene sulfonate2.

Choice B rationale: Widening of the QRS complex is not typically seen with the use of polystyrene sulfonate2.

Choice C rationale: Polystyrene sulfonate is used to treat hyperkalemia (high potassium levels). As potassium levels decrease, the peaked T wave seen in hyperkalemia may reduce234.

Choice D rationale: An increase in T wave amplitude is not typically associated with the use of polystyrene sulfonate2.

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Correct Answer is B

Explanation

Choice A rationale: While a chest x-ray can provide useful information about the heart and lungs, it is not typically required before an elective cardioversion89.

Choice B rationale: A transesophageal echocardiogram is often performed before cardioversion to check for the presence of any clots in the heart891011.

Choice C rationale: An exercise stress test is not typically required before an elective cardioversion89.

Choice D rationale: A central line placement for thrombolytic medication administration is not typically required before an elective cardioversion89.
So, the correct answer is Choice B, after analyzing all choices.

A. Epinephrine B. Atropine C. Adenosine D. Verapamil

Correct Answer is B

Explanation

Choice A rationale: Epinephrine is a potent vasoconstrictor and is typically used in emergency situations such as cardiac arrest. It is not the first-line treatment for symptomatic bradycardia1.

Choice B rationale: Atropine is the first-line medication for the treatment of bradycardia. It increases the heart rate by blocking the effects of the vagus nerve on the heart1.

Choice C rationale: Adenosine is primarily used to treat supraventricular tachycardia, not bradycardia1.

Choice D rationale: Verapamil is a calcium channel blocker used to treat high blood pressure, angina, and certain heart rhythm disorders, not typically used for bradycardia1.

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A nurse is caring for a client who has a serum potassium level of 5.9 mEq/L. The provider prescribes polystyrene sulfonate. If this medication is effective, the nurse should expect which of the following changes on the client's ECG?

Nursing Test Bank

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