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 D
Explanation
A) "Pentoxifylline can be administered to help the platelets from sticking together and occluding the vessels": Pentoxifylline is a medication used to improve blood flow by decreasing the viscosity of blood. However, it is not typically used to treat mitral valve stenosis. This statement does not accurately reflect treatment options for this condition.
B) "A heparin bolus is administered and followed with a continuous infusion to help keep the blood thinner": Heparin is an anticoagulant used to prevent blood clot formation, but it is not a treatment for mitral valve stenosis itself. While anticoagulants may be used in certain situations with mitral valve stenosis (such as in the setting of atrial fibrillation), they do not directly address the underlying valve narrowing.
C) "A flexible catheter will be inserted into a vessel of the arm, neck, or groin and advanced to the heart to dilate a narrowed or occluded artery": This statement describes a procedure known as percutaneous transluminal mitral valvuloplasty (PTMV), which is a minimally invasive intervention used to treat mitral valve stenosis. During this procedure, a catheter with a deflated balloon on its tip is inserted into a vessel and guided to the heart, where the balloon is inflated to widen the narrowed valve.
D) "A small catheter with a balloon on the end is threaded into a vessel in the groin and advanced to the heart where the balloon will be inflated, and the narrowed valve will be dilated": This statement accurately describes balloon valvuloplasty, which is a common procedure used to treat mitral valve stenosis. By inflating the balloon within the narrowed valve, the procedure aims to widen the valve opening, thus improving blood flow through the heart.
Correct Answer is A
Explanation
A. "I can't get out of bed because the room is spinning": The sensation of vertigo, or the perception of spinning or movement when there is none, is a hallmark symptom of Meniere's disease. This sensation is often severe and can be debilitating, leading to difficulty with balance and mobility. Therefore, the client's statement indicating that they cannot get out of bed due to the room spinning is consistent with manifestations of Meniere's disease.
B. "I did feel some fluid dripping from my ear when I laid down": While fluid leakage from the ear can be a symptom of various ear conditions, such as otitis externa or otitis media, it is not typically associated with Meniere's disease. Meniere's disease is characterized by recurrent episodes of vertigo, hearing loss, tinnitus, and a feeling of fullness or pressure in the ear, rather than fluid leakage.
C. "Sometimes I feel slightly dizzy when I am in a loud restaurant": Feeling slightly dizzy in a loud environment may suggest sensitivity to noise (phonophobia) or a mild form of dizziness such as disequilibrium, but it is not specific to Meniere's disease. Meniere's disease typically presents with severe episodes of vertigo rather than mild dizziness.
D. "I often feel like I have cotton balls in my ears": The sensation of having cotton balls in the ears may indicate a feeling of fullness or pressure in the ears, which is a common symptom of Meniere's disease. However, this symptom alone is not sufficient to diagnose Meniere's disease, as it can also occur in other conditions affecting the middle ear, such as eustachian tube dysfunction or otitis media. Additionally, Meniere's disease is primarily characterized by vertigo, not just ear fullness or pressure.
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