(1 point). Listen.
A nurse is asked why myocardial ischemia is usually reversible within 20 minutes.
What is the nurse's best response?

The heart stores approximately 20 minutes' worth of oxygen supply in the myoglobin.

Collateral blood flow to the myocardium can maintain the myocardium for 20 minutes.

It takes 20 minutes for neutrophils and macrophages to arrive and activate inflammation.

Anaerobic metabolism maintains cellular integrity for approximately 20 minutes.

Answer and Explanation

The Correct Answer is B

Choice A rationale:

The nurse's best response is not choice A because the heart does not store 20 minutes' worth of oxygen supply in myoglobin. Myoglobin is a protein in muscles that stores oxygen, but it is not the primary source of oxygen for the heart.

Choice B rationale:

The nurse's best response is choice B. Collateral blood flow to the myocardium can maintain the myocardium for about 20 minutes during myocardial ischemia. Collateral blood vessels can provide an alternative source of blood supply to the heart muscle, which may temporarily sustain it in the absence of normal blood flow.

Choice C rationale:

Choice C is not the best response because the arrival of neutrophils and macrophages and the activation of inflammation are not the primary reasons for the reversibility of myocardial ischemia within 20 minutes.

Choice D rationale:

Anaerobic metabolism can maintain cellular integrity for a limited time, but it is not the primary reason for the reversibility of myocardial ischemia within 20 minutes. The best response is choice B, which focuses on collateral blood flow as the primary reason.

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Free Nursing Study Resources

Correct Answer is C

Explanation

Choice A rationale:
Increased sympathetic nervous system (SNS) activity does not cause a decreased heart rate. In fact, increased SNS activity often leads to an increased heart rate as part of the "fight or flight" response, which is characterized by increased sympathetic activity.
Choice B rationale:
Increased sympathetic nervous system (SNS) activity does not result in increased renal excretion of sodium. Instead, it can lead to increased sodium reabsorption by the kidneys as part of the body's response to stress.
Choice D rationale:
Increased sympathetic nervous system (SNS) activity does not cause decreased insulin resistance. In fact, it can contribute to insulin resistance, as chronic stress and high levels of stress hormones like epinephrine and norepinephrine can lead to impaired insulin sensitivity.

A. Insulin resistance. B. Left ventricular hypertrophy. C. Excessive excretion of fluid by the kidneys. D. Hormone dysfunction.

Correct Answer is B

Explanation

Choice A rationale:

Insulin resistance is not a typical complication of sustained hypertension. This statement is incorrect. While hypertension can lead to various complications, insulin resistance is not one of the primary complications associated with high blood pressure.

Choice B rationale:

Left ventricular hypertrophy is a common complication of sustained hypertension. This statement is correct. Prolonged high blood pressure can lead to the thickening and enlargement of the left ventricle of the heart, known as left ventricular hypertrophy. This is a well-recognized and common complication of hypertension.

Choice C rationale:

Excessive excretion of fluid by the kidneys is not a typical complication of sustained hypertension. This statement is incorrect. Hypertension often leads to kidney damage, but it is more likely to result in reduced kidney function and fluid retention rather than excessive fluid excretion.

Choice D rationale:

Hormone dysfunction is not a primary complication of sustained hypertension. This statement is incorrect. While hypertension can affect various physiological processes, it is not a direct cause of hormone dysfunction. Hormone dysfunction may be related to other conditions, but it is not a direct consequence of hypertension. .

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(1 point). Listen.A nurse is asked why myocardial ischemia is usually reversible within 20 minutes.What is the nurse's best response?

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Naxlex Comprehensive Predictor Exams

(1 point). Listen. When a nurse is describing the development of primary hypertension, which information is correct? Increased sympathetic nervous system (SNS) activity causes:

Correct Answer is C

Explanation

(1 point). Listen.Over time, if a patient has sustained hypertension, which complication should the nurse expect in this patient?

Correct Answer is B

Explanation

If a patient has secondary hypertension, the nurse realizes that the patient has an abnormal blood pressure caused by:.

(1 point). Listen.A patient has hyperhomocysteinemia.Which foods should the nurse encourage the patient to consume? Foods high in:.

(1 point). Listen.A patient has hyperhomocysteinemia.Which foods should the nurse encourage the patient to consume? Foods high in:.

(1 point):. Which of the following cardiovascular complications should the nurse assess for in a patient with human immunodeficiency virus (HIV)?

(1 point). Listen.A patient has atherosclerosis.Which factor associated with endothelial injury will the nurse observe written in the history?

(1 point). Listen. A patient is diagnosed with chronic pulmonary disease and elevated pulmonary vascular resistance. Which of the following heart failures does the nurse assess for in this patient?

(1 point):. A patient has peripheral artery disease and experiences pain on ambulation.Which term should the nurse use to describe this finding?

Listen.Which of the following patients should be monitored closely by the nurse for superior vena cava syndrome?

(1 point). Listen.
A nurse is asked why myocardial ischemia is usually reversible within 20 minutes.
What is the nurse's best response?