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.

Answer and Explanation

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.

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Correct Answer is B

Explanation

A. Severe myopia: Severe myopia, or nearsightedness, is not a typical manifestation of Meniere's disease. Meniere's disease primarily affects the inner ear and is characterized by symptoms related to balance and hearing rather than vision.

B. Vertigo: Meniere's disease is a disorder of the inner ear that causes episodes of vertigo, which is a sensation of spinning or dizziness. Vertigo is a hallmark symptom of Meniere's disease and is often accompanied by nausea, vomiting, and a feeling of fullness or pressure in the affected ear.

C. Anosmia: Anosmia refers to a loss of the sense of smell and is not typically associated with Meniere's disease. Meniere's disease primarily affects the vestibular system (balance) and auditory system (hearing) rather than the sense of smell.

D. Photopsia: Photopsia refers to the perception of flashes of light in the visual field and is not a typical manifestation of Meniere's disease. Meniere's disease primarily affects the inner ear and is not directly related to visual disturbances.

A. "Your heart condition is caused by excessive stretching of the ventricles." B. "Your heart condition is caused from stiffening of the walls of the ventricles." C. "Your heart condition is caused by thickening of the ventricular walls and septum." D. "Your heart condition is caused when the ventricular tissue becomes fibrous and fatty."

Correct Answer is B

Explanation

A. "Your heart condition is caused by excessive stretching of the ventricles": This statement is incorrect. Excessive stretching of the ventricles typically occurs in dilated cardiomyopathy, not restrictive cardiomyopathy (RCM). In RCM, the primary issue is not excessive stretching but rather stiffening of the ventricular walls.

B. "Your heart condition is caused from stiffening of the walls of the ventricles": This statement is correct. Restrictive cardiomyopathy (RCM) is characterized by abnormal stiffening (fibrosis) of the ventricular walls, which impairs the heart's ability to fill properly during the diastolic phase of the cardiac cycle. This stiffening restricts the heart's ability to relax and fill with blood efficiently.

C. "Your heart condition is caused by thickening of the ventricular walls and septum": This statement describes hypertrophic cardiomyopathy (HCM), not restrictive cardiomyopathy (RCM). In HCM, there is abnormal thickening of the ventricular walls and septum, leading to impaired filling of the ventricles and potential obstruction of blood flow out of the heart.

D. "Your heart condition is caused when the ventricular tissue becomes fibrous and fatty": This statement describes arrhythmogenic right ventricular cardiomyopathy (ARVC), not restrictive cardiomyopathy (RCM). ARVC is characterized by replacement of myocardial tissue with fibrous and fatty tissue, primarily affecting the right ventricle.

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A nurse is teaching several newly licensed nurses about cardiac valve replacement. Which of the following should the nurse include in the teaching?

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Explanation

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Correct Answer is B

Explanation

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