The nurse is administering nitroglycerin intravenously to alleviate chest pain. What is the therapeutic action of this medication?
Increases glomerular filtration, resulting in decreased venous return.
Enhances the contractility of the myocardium, increasing oxygen delivery.
Produces an immediate analgesic effect, relieving chest pain.
Increases the coronary blood supply and decreases the afterload.
The Correct Answer is D
Choice A rationale
Increasing glomerular filtration would result in increased urine output, not decreased venous return. This action is not directly related to the therapeutic action of nitroglycerin.
Choice B rationale
While enhancing the contractility of the myocardium would increase oxygen delivery, this is not the primary action of nitroglycerin. Nitroglycerin primarily works by dilating the blood vessels, which reduces the amount of work the heart has to do and increases the blood supply to the heart muscle.
Choice C rationale
Nitroglycerin does not produce an immediate analgesic effect. While it can relieve chest pain, it does so by increasing blood flow to the heart, not by acting as an analgesic.
Choice D rationale
Nitroglycerin increases the coronary blood supply and decreases the afterload314. By dilating the blood vessels, nitroglycerin reduces the amount of work the heart has to do and increases the blood supply to the heart muscle. This is the primary therapeutic action of nitroglycerin in alleviating chest pain.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale
Low urine osmolarity and creatinine clearance are not the primary indicators of inadequate renal perfusion in a patient being stabilized after an acute coronary syndrome. These measures reflect the concentration of the urine and the kidney’s ability to filter waste from the blood, respectively. While they can be affected by renal perfusion, they are not the most direct or reliable indicators.
Choice B rationale
A decreasing serum blood urea nitrogen (BUN) level is not typically associated with inadequate renal perfusion. In fact, a high BUN level may indicate that the kidneys aren’t working properly. However, BUN levels can be influenced by many factors, including protein intake and liver function, so they are not the most reliable indicator of renal perfusion.
Choice C rationale
A urine output of less than 30 mL/hr is a common sign of inadequate renal perfusion. The kidneys need adequate blood flow to filter waste products from the blood and produce urine. If renal perfusion is inadequate, urine output can decrease.
Choice D rationale
A urine-specific gravity of less than 1.010 is not typically associated with inadequate renal perfusion. Specific gravity is a measure of the concentration of solutes in the urine. It can be influenced by hydration status and certain kidney disorders, but it is not a direct measure of renal perfusion.
Correct Answer is D
Explanation
Choice A rationale
Exercise electrocardiography, also known as a stress test, is not typically the first-line emergent procedure for a patient with an acute myocardial infarction (AMI). This test is often used to diagnose coronary artery disease, but it is not typically used to treat an AMI5.
Choice B rationale
A computed tomography (CT) scan of the chest with contrast could be used to visualize the heart and surrounding structures, but it is not typically the first-line emergent procedure for a patient with an AMI5.
Choice C rationale
An echocardiogram could be used to visualize the heart’s structure and function, but it is not typically the first-line emergent procedure for a patient with an AMI5.
Choice D rationale
Percutaneous coronary intervention (PCI) is the correct answer. This procedure is often used as an emergent treatment for an AMI. It involves using a catheter to place a small structure called a stent to open up blood vessels in the heart that have been narrowed by plaque buildup.
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