Nokea
A nurse cares for a client who is prescribed magnetic resonance imaging (MRI) of the heart. The client’s health history includes a previous myocardial infarction and pacemaker implantation. Which action should the nurse take?
- A. Schedule an electrocardiogram just before the MRI.
- B. Notify the healthcare provider before scheduling the MRI.
- C. Call the physician and request a laboratory draw for cardiac enzymes.
- D. Instruct the client to increase fluid intake the day before the MRI.
Correct Answer: B
Rationale: Clients with pacemakers are generally not candidates for MRI due to the risk of device malfunction or tissue damage. The healthcare provider must be notified to determine the best course of action.
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Which of the following drugs have no mortality benefit?
- A. Nitrates
- B. Beta-blockers
- C. Trimetazidine
- D. RAAS blockers
Correct Answer: C
Rationale: Trimetazidine is used as an adjunct therapy in ischemic heart disease but does not have a proven mortality benefit, unlike RAAS blockers, beta-blockers, and nitrates.
The following antibiotics interfere with bacterial translation:
- A. Penicillin
- B. Ceftriaxone
- C. Azithromycin
- D. Ciprofloxacin
Correct Answer: C
Rationale: Azithromycin, a macrolide antibiotic, inhibits bacterial protein synthesis by binding to the 50S ribosomal subunit, thereby interfering with translation.
Closure of ductus will worsen following conditions
- A. Coarctation of Aorta
- B. TGA without VSD
- C. Pulmonary Atresia
- D. Hypoplastic left heart
Correct Answer: C
Rationale: Closure of the ductus arteriosus worsens pulmonary atresia by cutting off pulmonary blood flow.
Mitochondrial DNA
- A. Has its own genome
- B. Is responsible for some forms of myopathies
- C. Can transmit diseases from parents to children
- D. Is present in neurons
Correct Answer: B
Rationale: Is responsible for some forms of myopathies
In the most common type of CAH:
- A. Autosomal dominant transmission occurs
- B. II -Hydroxylase is deficient
- C. Hypertension is seen
- D. 17-OH progesterone is increased
Correct Answer: D
Rationale: 17-OH progesterone is increased: In congenital adrenal hyperplasia (CAH), the most common form is 21-hydroxylase deficiency, leading to increased 17-hydroxyprogesterone levels.