A nurse is teaching several newly licensed nurses about cardiac valve replacement. Which of the following should the nurse include in the teaching?
The aortic and mitral valves are the most commonly replaced valves.
Mitral valve insufficiency occurs during the diastolic phase of the cardiac cycle.
Inadequate closure of the tricuspid valve causes overload in the left ventricle.
Aortic stenosis increases right ventricular systolic pressure and decreases afterload.
The Correct Answer is A
A. The aortic and mitral valves are the most commonly replaced valves: This statement is accurate. The aortic and mitral valves are indeed the most commonly replaced valves in cardiac valve replacement surgeries. Aortic valve replacement is commonly performed for conditions such as aortic stenosis or regurgitation, while mitral valve replacement is often indicated for mitral regurgitation or stenosis.
B. Mitral valve insufficiency occurs during the diastolic phase of the cardiac cycle: This statement is incorrect. Mitral valve insufficiency, also known as mitral regurgitation, occurs during the systolic phase of the cardiac cycle. It involves the backflow of blood from the left ventricle into the left atrium during ventricular systole, leading to volume overload of the left atrium and potentially causing symptoms such as dyspnea and fatigue.
C. Inadequate closure of the tricuspid valve causes overload in the left ventricle: This statement is incorrect. Inadequate closure of the tricuspid valve leads to regurgitation of blood from the right ventricle back into the right atrium during ventricular systole. This condition, known as tricuspid regurgitation, causes volume overload in the right atrium and ventricle, rather than overload in the left ventricle.
D. Aortic stenosis increases right ventricular systolic pressure and decreases afterload: This statement is partially correct. Aortic stenosis indeed increases left ventricular systolic pressure and decreases afterload, not right ventricular pressure. The increased afterload on the left ventricle can lead to left ventricular hypertrophy and eventually heart failure. However, aortic stenosis does not directly affect right ventricular systolic pressure.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. "I can't see anything from the sides of my eyes." This statement suggests a visual field deficit, which may be indicative of conditions affecting peripheral vision, such as glaucoma, retinal detachment, or optic nerve disorders. It is not a typical symptom of cataracts.
B. "My vision is almost gone from the center part of my eye." This statement indicates a central visual impairment, which is a common symptom of cataracts. Cataracts cause clouding of the lens, leading to blurred or dimmed vision, especially in the center of the visual field. This symptom often progresses gradually over time.
C. "My contact lenses just don't fit like they used to." This statement suggests discomfort or fit issues with contact lenses and is not specifically indicative of cataracts. It may be related to changes in the shape or health of the cornea, conjunctiva, or tear film.
D. "I keep seeing flashes of lights moving around in my eye." Flashes of light in the visual field are not typical symptoms of cataracts. They may indicate other ocular conditions such as vitreous detachment, migraines with aura, or retinal disorders.
Correct Answer is D
Explanation
A. Comply with compression therapy: Compression therapy is commonly used in the management of peripheral vascular disease (PVD), not valvular heart disease. It involves applying external pressure to the limbs to improve circulation and reduce edema. While this intervention may be relevant for a client with PVD, it is not specific to valvular heart disease.
B. Monitor wounds on lower extremities: Monitoring wounds on lower extremities is important for clients with peripheral vascular disease (PVD) to assess for signs of poor wound healing, infection, or tissue ischemia. However, it is not directly related to valvular heart disease. Therefore, while wound monitoring may be appropriate for this client, it is not specific to valvular heart disease education.
C. Take antiplatelet medications as ordered: Antiplatelet medications, such as aspirin or clopidogrel, are commonly prescribed for clients with peripheral vascular disease (PVD) to reduce the risk of thrombotic events and improve blood flow. However, they are not typically indicated as a primary treatment for valvular heart disease. While some clients with valvular heart disease may have comorbidities that warrant antiplatelet therapy, it is not specific to valvular heart disease education.
D. Valvular heart disease involves dysfunction of one or more heart valves, leading to impaired blood flow within the heart. The nurse should educate the client on monitoring for the gradual onset of symptoms related to valvular heart disease. These symptoms may include dyspnea (shortness of breath), fatigue, palpitations, chest discomfort, and edema. Monitoring for these symptoms allows for early detection of disease progression or exacerbation, prompting timely intervention and management.
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