What is the primary pathophysiological reason for performing Coronary Artery Bypass Surgery?
To reduce overall contractility of the heart muscle.
To reduce plaque buildup in the carotid artery.
To increase oxygen supply to the heart muscle.
To increase the myocardial workload.
The Correct Answer is C
Choice A rationale
Reducing the overall contractility of the heart muscle is not the primary reason for performing Coronary Artery Bypass Surgery (CABG)4. In fact, reducing the contractility of the heart muscle could potentially decrease the heart’s ability to pump blood effectively.
Choice B rationale
Reducing plaque buildup in the carotid artery is not the primary reason for performing CABG4. While plaque buildup in the carotid artery can lead to serious conditions such as stroke, CABG is specifically performed to bypass blocked coronary arteries, not carotid arteries.
Choice C rationale
Increasing the oxygen supply to the heart muscle is the primary reason for performing CABG4. When coronary arteries become blocked or narrowed due to plaque buildup, the heart muscle may not receive enough oxygen-rich blood. CABG is performed to create a new route, or bypass, around the blocked artery, which improves blood flow and oxygen supply to the heart muscle.
Choice D rationale
Increasing the myocardial workload is not the primary reason for performing CABG4. In fact, increasing the workload of the heart could potentially exacerbate heart disease and lead to complications such as heart failure.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
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.
Correct Answer is B
Explanation
Choice A rationale
While reducing anxiety and alleviating pain are important, they are not the most appropriate initial nursing intervention for a client with substernal chest pain, elevated ST segment on the ECG, and increased cardiac troponin level.
Choice B rationale
Enhancing myocardial oxygenation and decreasing cardiac workload are crucial initial nursing interventions for a client presenting with these symptoms. These actions can help prevent further damage to the heart muscle.
Choice C rationale
Removing family stressors and providing a tranquil environment, while beneficial, are not the most appropriate initial nursing interventions for a client with these symptoms.
Choice D rationale
Initiating a low-sodium diet and limiting fluid intake are important for managing heart failure, but they are not the most appropriate initial nursing interventions for a client with these symptoms.
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