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A patient who has recently recovered from a systemic viral infection is undergoing diagnostic testing for myocarditis. Which of the nurses assessment findings is most consistent with myocarditis?
- A. Sudden changes in level of consciousness (LOC)
- B. Peripheral edema and pulmonary edema
- C. Pleuritic chest pain
- D. Flulike symptoms
Correct Answer: D
Rationale: The most common symptoms of myocarditis are flulike. Chest pain, edema, and changes in LOC are not characteristic of myocarditis.
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A patient with mitral valve prolapse is admitted for a scheduled bronchoscopy to investigate recent hemoptysis. The physician has ordered gentamicin to be taken before the procedure. What is the rationale for this?
- A. To prevent bacterial endocarditis
- B. To prevent hospital-acquired pneumonia
- C. To minimize the need for antibiotic use during the procedure
- D. To decrease the need for surgical asepsis
Correct Answer: A
Rationale: Antibiotic prophylaxis is recommended for high-risk patients immediately before and sometimes after the following invasive procedures, such as bronchoscopy. Gentamicin would not be given to prevent pneumonia, to avoid antibiotic use during the procedure, or to decrease the need for surgical asepsis.
A patient with hypertrophic cardiomyopathy (HCM) has been admitted to the medical unit. During the nurses admission interview, the patient states that she takes over-the-counter water pills on a regular basis. How should the nurse best respond to the fact that the patient has been taking diuretics?
- A. Encourage the patient to drink at least 2 liters of fluid daily.
- B. Increase the patients oral sodium intake.
- C. Inform the care provider because diuretics are contraindicated.
- D. Ensure that the patients fluid balance is monitored vigilantly.
Correct Answer: C
Rationale: Diuretics are contraindicated in patients with HCM, so the primary care provider should be made aware. Adjusting the patients sodium or fluid intake or fluid monitoring does not address this important contraindication.
The cardiac nurse is caring for a patient who has been diagnosed with dilated cardiomyopathy (DCM). Echocardiography is likely to reveal what pathophysiological finding?
- A. Decreased ejection fraction
- B. Decreased heart rate
- C. Ventricular hypertrophy
- D. Mitral valve regurgitation
Correct Answer: A
Rationale: DCM is distinguished by significant dilation of the ventricles without simultaneous hypertrophy. The ventricles have elevated systolic and diastolic volumes, but a decreased ejection fraction. Bradycardia and mitral valve regurgitation do not typically occur in patients with DCM.
A patient who has undergone valve replacement surgery is being prepared for discharge home. Because the patient will be discharged with a prescription for warfarin (Coumadin), the nurse should educate the patient about which of the following?
- A. The need for regularly scheduled testing of the patients International Normalized Ratio (INR)
- B. The need to learn to sleep in a semi-Fowlers position for the first 6 to 8 weeks to prevent emboli
- C. The need to avoid foods that contain vitamin K
- D. The need to take enteric-coated ASA on a daily basis
Correct Answer: A
Rationale: Patients who take warfarin (Coumadin) after valve replacement have individualized target INRs; usually between 2 and 3.5 for mitral valve replacement and 1.8 and 2.2 for aortic valve replacement. Natural sources of vitamin K do not normally need to be avoided and ASA is not indicated. Sleeping upright is unnecessary.
The nurse is admitting a patient with complaints of dyspnea on exertion and fatigue. The patients ECG shows dysrhythmias that are sometimes associated with left ventricular hypertrophy. What diagnostic tool would be most helpful in diagnosing cardiomyopathy?
- A. Cardiac catheterization
- B. Arterial blood gases
- C. Echocardiogram
- D. Exercise stress test
Correct Answer: C
Rationale: The echocardiogram is one of the most helpful diagnostic tools because the structure and function of the ventricles can be observed easily. The ECG is also important, and can demonstrate dysrhythmias and changes consistent with left ventricular hypertrophy. Cardiac catheterization specifically addresses coronary artery function and arterial blood gases evaluate gas exchange and acid balance. Stress testing is not normally used to differentiate cardiomyopathy from other cardiac pathologies.