A nurse is planning care for a client who has suspected cardiac tamponade. Which of the following diagnostic tests should the nurse anticipate the provider to order first?
Computed tomography (CT) scan
Chest x-ray
Echocardiogram
Electrocardiogram (ECG)
The Correct Answer is C
A) Computed tomography (CT) scan: A CT scan may provide detailed images of the heart and surrounding structures, but it is not typically the initial diagnostic test used to assess for cardiac tamponade. CT scans are often used in conjunction with other diagnostic tests but are not the first-line investigation for suspected tamponade.
B) Chest x-ray: While a chest x-ray may show signs of cardiac tamponade, such as an enlarged cardiac silhouette or evidence of fluid accumulation around the heart, it is not as sensitive or specific as other diagnostic tests, particularly in the acute setting. Chest x-rays may be obtained as part of the diagnostic workup, but they are not the first-line test for suspected tamponade.
C) Echocardiogram: An echocardiogram is the most appropriate initial diagnostic test for suspected cardiac tamponade. It provides real-time imaging of the heart and can detect pericardial effusion, collapse of the right atrium and ventricle during diastole (diastolic collapse), and signs of hemodynamic compromise. Echocardiography allows for rapid assessment at the bedside and can guide immediate management decisions.
D) Electrocardiogram (ECG): While an electrocardiogram may show nonspecific changes in cardiac tamponade, such as low-voltage QRS complexes or electrical alternans, it is not as sensitive or specific as an echocardiogram for diagnosing tamponade. ECG findings may support the diagnosis but are not typically the first-line test for suspected tamponade.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Cushing's Triad is a set of three classic signs associated with increased intracranial pressure (ICP). These signs include hypertension, bradycardia, and irregular respirations. The presence of Cushing's Triad indicates severe brain injury or increased ICP, often leading to brainstem compression.
A. Tachycardia (Option A): Increased intracranial pressure can initially lead to tachycardia as the body attempts to compensate for the changes. However, as ICP continues to rise and brainstem compression occurs, the sympathetic response diminishes, resulting in bradycardia rather than tachycardia. Therefore, Cushing's Triad is not associated with preventing tachycardia.
B. Agonal breathing (Option B): Agonal breathing, characterized by gasping, labored breathing, or irregular breathing patterns, may occur as a result of brainstem dysfunction or damage. Cushing's Triad, indicative of increased ICP and impending brainstem herniation, does not prevent agonal breathing. In fact, irregular respirations are part of Cushing's Triad.
C. Chest pain (Option C): Chest pain may occur due to various cardiac or respiratory conditions and is not directly related to Cushing's Triad or increased intracranial pressure. Therefore, Cushing's Triad does not prevent chest pain.
D. Brainstem ischemia (Option D): Increased intracranial pressure can lead to brainstem compression, compromising blood flow to the brainstem and resulting in brainstem ischemia. Cushing's Triad, characterized by hypertension, bradycardia, and irregular respirations, is a nervous system response indicative of severe brain injury or increased ICP, which can lead to brainstem ischemia if left untreated. Therefore, Cushing's Triad is associated with brainstem ischemia rather than preventing it.
Correct Answer is D
Explanation
A. "The heart and the coronary arteries weaken, leading to poor perfusion and resulting in angina": This statement is inaccurate. While angina can result from poor perfusion to the heart muscle, it is not typically due to weakening of the heart and coronary arteries. Angina often occurs due to coronary artery narrowing or blockage, leading to reduced blood flow and oxygen delivery to the myocardium.
B. "Coronary arteries become more elastic causing the arteries to stretch as individuals age causing the heart not to receive enough oxygen": This statement is incorrect. Coronary arteries do not become more elastic with age; in fact, they tend to become less elastic due to the development of atherosclerosis, which leads to arterial stiffening and decreased compliance. Atherosclerosis can cause narrowing or occlusion of the coronary arteries, resulting in reduced oxygen delivery to the heart muscle.
C. "Coronary arteries decrease in diameter leading to insufficient blood, oxygen, and nutrients reaching the heart muscle. Manifestations occur due to dilation of coronary arteries with increased blood flow causing increased pressure": This statement is partially incorrect. While it accurately describes the consequences of coronary artery narrowing (decrease in diameter) leading to insufficient blood, oxygen, and nutrient delivery to the heart muscle, the second part of the statement regarding dilation of coronary arteries with increased blood flow causing increased pressure is inaccurate. Coronary artery dilation is a compensatory response to increased demand for oxygen, aiming to improve blood flow to the myocardium. However, dilation alone does not increase pressure in the coronary arteries.
D. "Coronary arteries decrease in diameter leading to insufficient blood, oxygen, and nutrients reaching the heart muscle": This statement is accurate. Coronary artery disease (CAD) involves the progressive narrowing of the coronary arteries due to atherosclerosis, which reduces blood flow to the myocardium. As the arteries narrow, there is insufficient blood, oxygen, and nutrients reaching the heart muscle, leading to manifestations such as angina, myocardial ischemia, and potentially myocardial infarction.
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