RN exams cardiovascular practice questions set 29

Correct answer:

The correct answer is A: Blood pressure. When administering dobutamine, a medication that increases heart contractility, the most important parameter to assess is blood pressure. This is because dobutamine can cause significant changes in blood pressure, including hypotension or hypertension, which can have serious implications for the client's hemodynamic stability. Monitoring blood pressure allows for timely intervention and adjustment of the medication dosage to ensure optimal cardiovascular function. Heart rate (B), oxygen saturation (C), and respiratory rate (D) are also important parameters to monitor but are not the primary concern when administering dobutamine, as its effects on blood pressure are more critical for patient safety and treatment efficacy.

Correct answer:

Rationale: Choice C is correct because a surrogate is indeed a competent adult designated to make healthcare decisions for an incapacitated person. This individual is typically chosen by the person themselves through a legal document like a healthcare proxy. This ensures that someone trusted can make important decisions when the person is unable to do so. Choices A, B, and D are incorrect because a living will and healthcare proxy serve different purposes, a signed donor card does not guarantee organ donation in the event of brain death (medical criteria are also required), and a persistent vegetative state is different from brain death (brain death implies irreversible cessation of brain function while a vegetative state involves some level of brain function).

Correct answer:

The correct answer is A: Blood pressure. When administering dobutamine, a medication that increases heart contractility, the most important parameter to assess is blood pressure. This is because dobutamine can cause significant changes in blood pressure, including hypotension or hypertension, which can have serious implications for the client's hemodynamic stability. Monitoring blood pressure allows for timely intervention and adjustment of the medication dosage to ensure optimal cardiovascular function. Heart rate (B), oxygen saturation (C), and respiratory rate (D) are also important parameters to monitor but are not the primary concern when administering dobutamine, as its effects on blood pressure are more critical for patient safety and treatment efficacy.

Correct answer:

The correct answer is D because cholecalciferol, also known as vitamin D3, exerts its effects through genomic effects (regulating gene expression) and cytoplasmic effects (regulating calcium transport). This is crucial for its role in calcium homeostasis and bone health. A is incorrect because cholecalciferol is typically administered orally and does not require frequent monitoring of calcium and phosphorus serum levels. B is incorrect because cholecalciferol promotes bone formation by enhancing osteoblast activity, not inhibiting osteoclasts. C is incorrect because cholecalciferol actually helps increase serum calcium levels by enhancing calcium absorption in the intestines and promoting calcium reabsorption in the kidneys, rather than lowering them.

Correct answer:

The correct answer is B: Help the patient modify favorite high-fat recipes by using monounsaturated oils. Rationale: 1. Modifying favorite recipes helps ensure compliance as the patient is more likely to enjoy the food. 2. Using monounsaturated oils is healthier than saturated fats, supporting cardiovascular health. 3. This intervention promotes gradual and sustainable dietary changes, increasing long-term success. Summary of Incorrect Choices: A. Eliminating all saturated fats and salt may be too restrictive and difficult to maintain. C. Focusing on risks alone may not motivate the patient effectively without practical guidance. D. Providing a list of foods may not address the patient's preferences or help them apply changes to their daily meals effectively.

Correct answer:

The most likely diagnosis in this scenario is Juvenile myelomonocytic leukemia (JMML). This is supported by the presence of hepatosplenomegaly, maculopapular rash, leukocytosis, anemia, and thrombocytopenia in a young child. The elevated fetal hemoglobin level is characteristic of JMML. Additionally, a normal blood karyotype helps differentiate JMML from other leukemias. Choice A (Leukemoid Reaction) is incorrect because it is typically a reactive condition due to infections, not a primary hematological malignancy like JMML. Choice B (Acute lymphoblastic leukemia) is less likely due to the presence of hepatosplenomegaly and a high fetal hemoglobin level. Choice C (Chronic myeloid leukemia) is less likely in a young child with the given clinical presentation.

Correct answer:

Rationale: 1. Type I familial hyperlipoproteinemia is characterized by increased chylomicrons and triglycerides in the serum, which decrease with a fat-free diet. 2. High- and low-density lipoproteins decrease with a fat-free diet, contrary to other types of hyperlipoproteinemia. 3. Tissue lipoprotein lipase activity is decreased in type I familial hyperlipoproteinemia. 4. Other choices are incorrect because they do not accurately describe the characteristics and pathophysiology of type I familial hyperlipoproteinemia. Summary: Choice A is correct as it aligns with the hallmark features of type I familial hyperlipoproteinemia. Choices B, C, and D contain inaccuracies regarding the lipid profile, genetic basis, and response to dietary changes in this condition.

Correct answer:

The correct answer is D: Decreased reabsorption of Ca2+ in the loop of Henle. Furosemide is a loop diuretic that inhibits the Na+/K+/2Cl- co-transporter in the thick ascending limb of the loop of Henle, leading to decreased reabsorption of Na+ and Ca2+. This leads to an increase in the excretion of Ca2+ in the urine, resulting in metabolic alkalosis due to loss of H+ ions in exchange for Na+ and Ca2+. A: Increased reabsorption of uric acid is not directly related to furosemide-induced metabolic alkalosis. B: Increased delivery of Na+ to the distal tubule would lead to increased reabsorption of Na+ and water, which would not result in metabolic alkalosis. C: Mild inhibition of carbonic anhydrase would not directly cause furosemide-induced metabolic alkalosis.

Correct answer:

Step-by-step rationale for the correct answer (D): 1. Pamidronate is a bisphosphonate used to treat conditions involving excessive bone breakdown. 2. Hypercalcemia is a condition characterized by elevated calcium levels in the blood. 3. Pamidronate works by inhibiting bone resorption, which helps lower blood calcium levels in hypercalcemia. 4. Therefore, the indication for pamidronate administration is hypercalcemia. Summary of other choices: A: Failure of vitamin D formation in skin - Not related to pamidronate use. B: Hypoparathyroidism - Pamidronate is not indicated for hypoparathyroidism. C: Elevated skeletal turnover - While pamidronate is used for conditions involving high skeletal turnover, hypercalcemia is the primary indication for its administration.

Correct answer:

The correct answer is C: H3 K27M mutation. This mutation is most commonly associated with diffuse intrinsic pontine gliomas (DIPG), which are high-grade brain tumors typically found in children. The presence of a diffusely infiltrative mass in the pons in a 5-year-old boy with neurological symptoms points towards a DIPG. Stereotactic biopsy of the mass would likely reveal the H3 K27M mutation, which is a key molecular finding in DIPG. Choice A (BRAFKIAA1549 fusion) is incorrect as this fusion is typically associated with pilocytic astrocytomas, not DIPGs. Choice B (Trisomy 21) is incorrect as it is not a molecular finding commonly associated with DIPGs. Choice D (RELA fusion) is also incorrect as this fusion is more commonly seen in ependymomas, not DIPGs.