A nurse is assisting in the plan of care for a client who has a suspected myocardial infarction. Which of the following medications should the nurse plan to administer first?

Morphine

Nitroglycerin

Aspirin

Oxygen

Answer and Explanation

The Correct Answer is D

Choice A reason : Morphine is an opioid analgesic used to relieve severe pain and can be administered to patients with myocardial infarction to alleviate chest pain and anxiety. However, it is not the first medication given as it does not address the underlying cause of the myocardial infarction, which is the formation of a blood clot in the coronary arteries.

Choice B reason : Nitroglycerin is a nitrate that helps to dilate blood vessels and improve blood flow. It can be used to relieve chest pain in myocardial infarction, but similar to morphine, it is not the initial medication of choice. The priority is to prevent further blood clotting.

Choice C reason : Administered as soon as possible to inhibit platelet aggregation and reduce clot progression.

Choice D reason : When a myocardial infarction (MI) is suspected, the priority is to address tissue hypoxia and ensure adequate oxygenation to minimize myocardial damage. Administering oxygen helps increase oxygen availability to the ischemic heart tissue, reducing further damage.

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Correct Answer is D

Explanation

Choice A reason: The PR interval, which is the time from the onset of atrial depolarization (beginning of the P wave) to the onset of ventricular depolarization (beginning of the QRS complex), normally ranges from 0.12 to 0.20 seconds. A PR interval of 0.15 second is within the normal range and does not indicate an acute myocardial infarction.

Choice B reason: The QT interval represents the total time for ventricular depolarization and repolarization. The normal QT interval varies based on heart rate and gender but is typically less than half of the R-R interval in a normal heart rhythm. Therefore, a QT interval equal to the R-R interval is abnormally prolonged, which may suggest other conditions but is not a specific indicator of acute myocardial infarction.

Choice C reason: The QRS complex reflects ventricular depolarization and normally ranges from 0.06 to 0.10 seconds. A QRS interval of 0.08 second is within the normal range and does not suggest an acute myocardial infarction.

Choice D reason: ST segment elevation is a critical finding in the diagnosis of acute myocardial infarction. The ST segment should be at the isoelectric line; elevation above this line is indicative of myocardial injury and is a key diagnostic criterion for ST-elevation myocardial infarction (STEMI). An elevated ST segment is often seen in the early stages of an acute myocardial infarction and requires immediate medical attention.

A. Have the laboratory draw a blood sample for an erythrocyte sedimentation rate B. Obtain a 12-lead ECG C. Administer potassium gluconate 40 mEq orally D. Restrict fluid intake

Correct Answer is B

Explanation

Choice A reason : An erythrocyte sedimentation rate (ESR) test is not directly related to high serum potassium levels and would not be the immediate action in response to hyperkalemia.

Choice B reason : Obtaining a 12-lead ECG is a critical step when hyperkalemia is suspected because high potassium levels can cause life-threatening cardiac arrhythmias. An ECG can quickly reveal characteristic changes associated with hyperkalemia, allowing for prompt treatment.

Choice C reason : Administering potassium gluconate would be contraindicated in a patient with hyperkalemia, as it would further increase the serum potassium levels, potentially leading to severe complications.

Choice D reason : Restricting fluid intake is not a standard treatment for hyperkalemia. The management of hyperkalemia may include medications or procedures that promote the excretion of potassium or move potassium from the blood into the cells.

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A nurse is assisting in the plan of care for a client who has a suspected myocardial infarction. Which of the following medications should the nurse plan to administer first?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

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Correct Answer is D

Explanation

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Correct Answer is B

Explanation

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