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 A

Explanation

Choice A rationale
Standing frequently can help promote blood flow in the legs, which can be beneficial for a patient with arterial insufficiency. This is because standing engages the muscles in the legs, which helps push blood back up towards the heart.
Choice B rationale
Walking without shoes is not typically recommended for patients with arterial insufficiency. This is because these patients often have reduced sensation in their feet and may not notice if they step on something sharp or if a wound develops.
Choice C rationale
Vigorous massage of the legs is not usually recommended for patients with arterial insufficiency. While gentle massage can help promote blood flow, vigorous massage could potentially damage the arteries further.
Choice D rationale
Allowing the legs to dangle dependently often is not typically recommended for patients with arterial insufficiency. This position can actually increase swelling and discomfort in the legs.

A. Aortic regurgitation B. Mitral regurgitation C. Aortic stenosis D. Tricuspid regurgitation

Correct Answer is D

Explanation

Choice A rationale
Aortic regurgitation is a condition where the aortic valve doesn’t close tightly, causing blood to leak back into the left ventricle. This condition can lead to left heart failure but is not typically associated with right heart failure.
Choice B rationale
Mitral regurgitation is a disorder in which the mitral valve on the left side of the heart does not close properly. This condition can lead to left heart failure but is not typically associated with right heart failure.
Choice C rationale
Aortic stenosis is a narrowing of the aortic valve opening. This condition can lead to left heart failure but is not typically associated with right heart failure.
Choice D rationale
Tricuspid regurgitation is a disorder in which the heart’s tricuspid valve does not close properly, causing blood to flow backward into the right atrium. This condition can lead to right heart failure, especially when associated with pulmonary hypertension.

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What is the primary cause of myocardial ischemia?

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Naxlex Comprehensive Predictor Exams

What is the most appropriate advice for a patient suffering from arterial insufficiency?

Correct Answer is A

Explanation

A 35-year-old patient presents with pulmonary hypertension and is diagnosed with right heart failure. What is the most likely cause of this condition?

Correct Answer is D

Explanation

What is the primary therapeutic goal for secondary hypertension?

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