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
Choice A rationale
A Ventricular septal defect (VSD) is a hole in the wall separating the two lower chambers of the heart. While it can cause cyanosis, it would not typically cause cyanosis only during crying or after feeding.
Choice B rationale
An Atrioventricular canal (AVC) defect is a combination of heart problems resulting in a defect in the center of the heart. While it can cause cyanosis, it would not typically cause cyanosis only during crying or after feeding.
Choice C rationale
Tetralogy of Fallot is a rare condition caused by a combination of four heart defects that are present at birth. These defects, which affect the structure of the heart, cause oxygen-poor blood to flow out of the heart and into the rest of the body. Infants and children with Tetralogy of Fallot usually have blue-tinged skin because their blood doesn’t carry enough oxygen. This is often more noticeable during episodes of crying or feeding.
Choice D rationale
An Atrial septal defect (ASD) is a hole in the wall between the two upper chambers of your heart (atria). The condition is present at birth (congenital). Small defects might be found by chance and never cause a problem. Some small atrial septal defects close during infancy or early childhood. While it can cause cyanosis, it would not typically cause cyanosis only during crying or after feeding.
Correct Answer is D
Explanation
Choice A rationale
Redness on both sides of the sternal incision could indicate a normal inflammatory response post-surgery or could be a sign of infection. However, it is not the most crucial observation to report in the context of a patient who has undergone coronary artery bypass grafting using a right radial artery graft.
Choice B rationale
Fine crackles heard at both lung bases could indicate fluid accumulation in the lungs, possibly due to heart failure or pneumonia. While this is a significant finding that requires further investigation, it is not the most crucial observation in this specific context.
Choice C rationale
Complaints of incisional chest pain are common after coronary artery bypass grafting. Pain management is an important part of post-operative care, but this symptom is not the most crucial to report in this context.
Choice D rationale
Pallor and weakness of the right hand could indicate compromised blood flow to the hand, which is a serious complication considering the right radial artery was used for the graft. This could lead to ischemia and tissue damage in the hand, thus it is the most crucial observation to report to the healthcare provider.
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