What is the primary cause of myocardial ischemia?

Idiopathic vasospasm.

Atherosclerosis.

Venous emboli.

Arterial emboli from a heart valve.

Answer and Explanation

The Correct Answer is B

Choice A rationale
Idiopathic vasospasm, or spontaneous constriction of the blood vessels, can cause myocardial ischemia. However, this is a relatively rare cause compared to atherosclerosis.
Choice B rationale
Atherosclerosis, a condition characterized by the buildup of fatty plaques in the arteries, is the most common cause of myocardial ischemia. These plaques can restrict blood flow to the heart muscle, leading to ischemia.
Choice C rationale
Venous emboli, or blood clots that form in the veins, typically do not cause myocardial ischemia. These clots are more likely to cause problems in the lungs (pulmonary embolism) if they travel through the bloodstream.
Choice D rationale
Arterial emboli from a heart valve can cause myocardial ischemia, but this is less common than atherosclerosis. These emboli, or blood clots, can block blood flow to the heart muscle if they travel through the bloodstream.

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Correct Answer is B

Explanation

Choice A rationale
Digoxin slows the heart rate and increases the force of heart contractions, which can be beneficial in heart failure. However, if the pulse is below 60 beats/min, taking digoxin could further slow the heart rate and potentially lead to bradycardia.
Choice B rationale
Nausea can be a side effect of digoxin and hydrochlorothiazide. If the patient develops nausea, they should notify their healthcare provider as this could indicate that the medication dose needs adjustment.
Choice C rationale
Hydrochlorothiazide can cause the body to lose potassium, so limiting dietary intake of potassium could potentially lead to hypokalemia, a condition characterized by low potassium levels in the blood.
Choice D rationale
Taking hydrochlorothiazide at bedtime could potentially lead to nocturia, which is the need to wake up at night to urinate. This could disrupt the patient’s sleep.

A. “I can expect nausea as a side effect of nitroglycerin.”. B. “I will call an ambulance if I have pain after taking 3 nitroglycerin 5 minutes apart.”. C. “Nitroglycerin helps prevent a clot from forming and blocking blood flow to my heart.”. D. “I should only take nitroglycerin when I have chest pain.”. .

Correct Answer is B

Explanation

The statement “I will call an ambulance if I have pain after taking 3 nitroglycerin 5 minutes apart” indicates that the patient understands the correct use of sublingual nitroglycerin (Nitrostat). If chest pain is not relieved after a total of 3 tablets or sprays, this is an emergency situation and medical help should be sought immediately.

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What is the primary cause of myocardial ischemia?

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Naxlex Comprehensive Predictor Exams

In the context of Interprofessional Care of the Client and Family Across the Lifespan, a nurse is planning discharge teaching for a patient with chronic heart failure who has been prescribed digoxin (Lanoxin) and hydrochlorothiazide. What instruction should the nurse include in the teaching?

Correct Answer is B

Explanation

Which patient statement indicates that the nurse’s teaching about sublingual nitroglycerin (Nitrostat) has been effective?

Correct Answer is B

Explanation

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