Diltiazem (Cardizem) has been prescribed for a patient newly diagnosed with Prinzmetal’s (variant) angina. What accurate action of diltiazem should the nurse include in the teaching plan?
It increases the contractile force of the heart.
It reduces heart palpitations.
It decreases coronary artery spasms.
It prevents the formation of plaque in the coronary arteries.
The Correct Answer is C
Choice A rationale
Diltiazem does not increase the contractile force of the heart. In fact, it is classified as a negative inotrope, meaning it decreases the force of heart contractions.
Choice B rationale
While diltiazem can affect heart rhythm, it does not specifically reduce heart palpitations. Its primary effect is to slow the heart rate and relax the blood vessels.
Choice C rationale
Diltiazem is a calcium channel blocker used to manage cardiovascular conditions such as hypertension, chronic stable angina, atrial fibrillation, and Prinzmetal’s angina. It works by inhibiting the calcium influx into cardiac and vascular smooth muscle during depolarization. This results in vasodilation, or the widening of blood vessels, which can help decrease coronary artery spasms, a characteristic feature of Prinzmetal’s angina.
Choice D rationale
Diltiazem does not prevent the formation of plaque in the coronary arteries. It primarily acts to relax the blood vessels and slow the heart rate.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
The patient with a blood pressure of 116/42 mm Hg has a mean arterial pressure (MAP) of approximately 67 mm Hg, which is less than the standard policy of 70 mm Hg. This could indicate inadequate blood flow to the vital organs, necessitating notification of the healthcare provider.
Correct Answer is B
Explanation
Choice A rationale
While dizziness after the first dose of captopril can be concerning, it is not uncommon as the body adjusts to the medication. It is important to monitor this patient, but they are not the highest priority.
Choice B rationale
A patient exhibiting new-onset confusion, restlessness, and cool, clammy skin should be prioritized for assessment. These symptoms could indicate a serious condition such as shock or decreased cardiac output. This patient may be experiencing a rapid decline in condition and should be assessed immediately.
Choice C rationale
While a patient on oxygen therapy with bilateral crackles at the lung bases may have worsening heart failure, they are not the highest priority if they are stable. Crackles at the lung bases are a common finding in heart failure and indicate fluid accumulation in the lungs.
Choice D rationale
A patient on IV nesiritide (Natrecor) with a blood pressure reading of 100/62 is not the highest priority. While this blood pressure is on the lower side, it is not critically low.
Nesiritide can cause hypotension, so this patient should be monitored, but they are not the highest priority if they are stable.
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