A nurse is caring for a client with a confirmed myocardial infarction (MI) and a history of congestive heart failure (CHF). The client is prescribed a medication to reduce myocardial oxygen demand. Which medication should the nurse expect to administer?
Furosemide.
Metoprolol.
Aspirin.
Nitroglycerin.
The Correct Answer is B
A) This choice is incorrect because furosemide is a loop diuretic used to treat fluid retention and edema in clients with congestive heart failure (CHF), but it does not directly reduce myocardial oxygen demand.
B) This choice is correct. Metoprolol is a beta-blocker that reduces heart rate and blood pressure, resulting in decreased myocardial oxygen demand. It is often prescribed to clients with an MI and a history of CHF to improve cardiac function and reduce the workload on the heart.
C) This choice is incorrect because aspirin is an antiplatelet medication that prevents further clot formation and is commonly prescribed in clients with acute coronary syndrome, including MI. While it is beneficial in the context of MI management, it does not directly reduce myocardial oxygen demand.
D) This choice is incorrect because nitroglycerin is a vasodilator used to relieve chest pain (angina) by dilating blood vessels and increasing blood flow to the heart muscle. While it helps reduce anginal symptoms, it does not directly reduce myocardial oxygen demand as metoprolol does.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A) This choice is correct. An electrocardiogram (ECG) is one of the primary diagnostic tests used to confirm the diagnosis of a myocardial infarction (MI). An ECG can show characteristic changes, such as ST-segment elevation or Q waves, indicative of myocardial ischemia and injury.
B) This choice is incorrect because an echocardiogram is a useful imaging test to assess the heart's structure and function, but it is not the primary diagnostic test for confirming an MI.
C) This choice is incorrect because a magnetic resonance imaging (MRI) is a valuable tool for assessing heart function and detecting certain cardiac abnormalities, but it is not typically the initial diagnostic test for MI.
D) This choice is incorrect because a chest X-ray can help identify other conditions like pulmonary edema or lung disorders, but it is not the primary diagnostic test for MI.
Correct Answer is B
Explanation
A) This choice is incorrect because chest pain caused by an irregular heart rhythm is more characteristic of arrhythmias, not angina pectoris.
B) This choice is correct. Angina pectoris is caused by the narrowing of the coronary arteries due to atherosclerotic plaques, leading to reduced blood flow to the heart muscle during periods of increased demand (e.g., physical exertion, stress).
C) This choice is incorrect because inflammation in the lining of the heart is associated with conditions like pericarditis or myocarditis, not angina pectoris.
D) This choice is incorrect because chest pain caused by the heart muscle overworking is more typical of conditions like heart failure, not angina pectoris.
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