Nokea
The nurse on the hospitals infection control committee is looking into two cases of hospital-acquired infective endocarditis among a specific classification of patients. What classification of patients would be at greatest risk for hospital-acquired endocarditis?
- A. Hemodialysis patients
- B. Patients on immunoglobulins
- C. Patients who undergo intermittent urinary catheterization
- D. Children under the age of 12
Correct Answer: A
Rationale: Hospital-acquired infective endocarditis occurs most often in patients with debilitating disease or indwelling catheters and in patients who are receiving hemodialysis or prolonged IV fluid or antibiotic therapy. Patients taking immunosuppressive medications or corticosteroids are more susceptible to fungal endocarditis. Patients on immunoglobulins, those who need in and out catheterization, and children are not at increased risk for nosocomial infective endocarditis.
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The nurse is caring for a patient with right ventricular hypertrophy and consequently decreased right ventricular function. What valvular disorder may have contributed to this patients diagnosis?
- A. Mitral valve regurgitation
- B. Aortic stenosis
- C. Aortic regurgitation
- D. Mitral valve stenosis
Correct Answer: D
Rationale: Because no valve protects the pulmonary veins from the backward flow of blood from the atrium, the pulmonary circulation becomes congested. As a result, the right ventricle must contract against an abnormally high pulmonary arterial pressure and is subjected to excessive strain. Eventually, the right ventricle fails. None of the other listed valvular disorders has this pathophysiological effect.
The staff educator is presenting a workshop on valvular disorders. When discussing the pathophysiology of aortic regurgitation the educator points out the need to emphasize that aortic regurgitation causes what?
- A. Cardiac tamponade
- B. Left ventricular hypertrophy
- C. Right-sided heart failure
- D. Ventricular insufficiency
Correct Answer: B
Rationale: Aortic regurgitation eventually causes left ventricular hypertrophy. In aortic regurgitation, blood from the aorta returns to the left ventricle during diastole in addition to the blood normally delivered by the left atrium. The left ventricle dilates, trying to accommodate the increased volume of blood. Aortic regurgitation does not cause cardiac tamponade, right-sided heart failure, or ventricular insufficiency.
The critical care nurse is caring for a patient who is receiving cyclosporine postoperative heart transplant. The patient asks the nurse to remind him what this medication is for. How should the nurse best respond?
- A. Azathioprine decreases the risk of thrombus formation.
- B. Azathioprine ensures adequate cardiac output.
- C. Azathioprine increases the number of white blood cells.
- D. Azathioprine minimizes rejection of the transplant.
Correct Answer: D
Rationale: After heart transplant, patients are constantly balancing the risk of rejection with the risk of infection. Most commonly, patients receive cyclosporine or tacrolimus (FK506, Prograf), azathioprine (Imuran), or mycophenolate mofetil (CellCept), and corticosteroids (prednisone) to minimize rejection. Cyclosporine does not prevent thrombus formation, enhance cardiac output, or increase white cell counts.
A community health nurse is presenting an educational event and is addressing several health problems, including rheumatic heart disease. What should the nurse describe as the most effective way to prevent rheumatic heart disease?
- A. Recognizing and promptly treating streptococcal infections
- B. Prophylactic use of calcium channel blockers in high-risk populations
- C. Adhering closely to the recommended child immunization schedule
- D. Smoking cessation
Correct Answer: A
Rationale: Group A streptococcus can cause rheumatic heart fever, resulting in rheumatic endocarditis. Being aware of signs and symptoms of streptococcal infections, identifying them quickly, and treating them promptly, are the best preventative techniques for rheumatic endocarditis. Smoking cessation, immunizations, and calcium channel blockers will not prevent rheumatic heart disease.
The nurse is caring for a recent immigrant who has been diagnosed with mitral valve regurgitation. The nurse should know that in developing countries the most common cause of mitral valve regurgitation is what?
- A. A decrease in gamma globulins
- B. An insect bite
- C. Rheumatic heart disease and its sequelae
- D. Sepsis and its sequelae
Correct Answer: C
Rationale: The most common cause of mitral valve regurgitation in developing countries is rheumatic heart disease and its sequelae.