What is the primary cause of myocardial ischemia?
Idiopathic vasospasm.
Atherosclerosis.
Venous emboli.
Arterial emboli from a heart valve.
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale
Ulceration on the medial surface of the lower legs is not the best description of stasis dermatitis in a patient with peripheral vascular disease (PVD). While ulcers can occur in severe cases, they are not the primary characteristic of stasis dermatitis.
Choice B rationale
Stasis dermatitis, also known as venous stasis dermatitis, is a skin inflammation that occurs in people with poor circulation. It most often happens in the lower legs because that’s where blood typically collects. When blood pools in the veins of the lower leg, it can cause a variety of symptoms, including a brownish skin discoloration on the lower legs. This discoloration is caused by the leakage of red blood cells into the skin due to increased pressure in the veins.
Choice C rationale
While edema in the lower legs can be a symptom of PVD and may accompany stasis dermatitis, it is not the best description of the condition. Edema is a general symptom that can occur in many conditions and is not specific to stasis dermatitis.
Choice D rationale
A purple rash on the medial surface of the lower legs is not a typical symptom of stasis dermatitis. While the skin may become discolored, it is usually a brownish color rather than purple.
Correct Answer is A
Explanation
Choice A rationale
Vasotec, an Angiotensin-Converting Enzyme (ACE) inhibitor, is commonly used to treat conditions like high blood pressure and heart failure. It works by relaxing blood vessels, which allows blood to flow more easily and reduces blood pressure.
Choice B rationale
Decreased urine output is not a typical outcome of taking Vasotec. In fact, ACE inhibitors like Vasotec can sometimes increase urine output by improving kidney function.
Choice C rationale
Increased appetite is not a known effect of Vasotec. If a patient experiences a significant change in appetite while taking this medication, they should consult their healthcare provider.
Choice D rationale
Increased fluid retention is not a typical outcome of taking Vasotec. ACE inhibitors like Vasotec are often used to help reduce fluid retention in patients with conditions like heart failure.
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