The nurse understands that which of the following is a manifestation of aortic stenosis?

Narrowed pulse pressure

Sinus tachycardia

Apical diastolic murmur

S3 heart sound

Answer and Explanation

The Correct Answer is A

A. Narrowed pulse pressure: Aortic stenosis leads to obstruction of blood flow from the left ventricle to the aorta during systole, reducing systolic pressure while diastolic pressure remains unchanged or slightly elevated. This results in a narrowed pulse pressure, a classic finding in moderate to severe aortic stenosis.

B. Sinus tachycardia: While tachycardia can occur in response to decreased cardiac output or stress, it is not a defining feature of aortic stenosis. The hallmark findings relate more directly to fixed cardiac output and valve obstruction.

C. Apical diastolic murmur: Aortic stenosis produces a systolic ejection murmur, best heard at the right second intercostal space and radiating to the carotids. An apical diastolic murmur would suggest mitral stenosis or other diastolic valve pathology.

D. S3 heart sound: An S3 is more indicative of volume overload and heart failure rather than valvular stenosis. While advanced aortic stenosis can lead to heart failure, the S3 is not a primary or early manifestation of this condition.

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Correct Answer is B

Explanation

A. Breast cancer treated with chemotherapy and radiation: While cancer and its treatments can suppress the immune system, they are not direct causes of infectious endocarditis. The condition is more closely related to bacteremia and structural heart damage.

B. Periodontal disease and gum surgery three months ago: Periodontal disease involves chronic bacterial infection of the gums and supporting structures of the teeth, this transient bacteremia can lead to infectious endocarditis. Oral infections and invasive dental procedures can introduce bacteria into the bloodstream, particularly streptococci, which can colonize damaged heart valves and cause infectious endocarditis.

C. Type II diabetic for ten years: Diabetes increases the risk of infection generally, but it is not a specific cause of endocarditis. Without a portal of entry or bacteremia, the condition alone is not strongly associated with endocarditis.

D. Myocardial infarction one year ago: A prior MI may result in reduced cardiac function but does not directly lead to infectious endocarditis unless it has resulted in damaged valves or introduced infection, which is not indicated here.

A. Have blood drawn weekly to check for high magnesium levels B. Avoid the use of salt substitutes in your diet C. Notify your physician if a headache develops D. Take your heart rate daily when on this medication

Correct Answer is B

Explanation

A. Have blood drawn weekly to check for high magnesium levels: Lisinopril, an ACE inhibitor, does not significantly affect magnesium levels. Regular monitoring is more important for potassium and renal function (BUN/creatinine), especially in heart failure patients, not magnesium.

B. Avoid the use of salt substitutes in your diet: Lisinopril is an ACE inhibitor. ACE inhibitors can cause potassium retention by reducing the production of aldosterone. Many salt substitutes contain high amounts of potassium chloride and combining the two may lead to hyperkalemia. Patients should be instructed to avoid these substitutes unless approved by their provider.

C. Notify your physician if a headache develops: Headache is a relatively common and usually mild side effect of lisinopril. It does not typically warrant discontinuation or immediate provider notification unless it's severe or persistent with other symptoms like dizziness or visual changes.

D. Take your heart rate daily when on this medication: Lisinopril does not significantly affect heart rate. Monitoring blood pressure is more relevant, as ACE inhibitors are antihypertensives. Heart rate monitoring is more critical with beta blockers or calcium channel blockers.

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The nurse understands that which of the following is a manifestation of aortic stenosis?

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Naxlex Comprehensive Predictor Exams

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Correct Answer is B

Explanation

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