A nurse is caring for a client admitted to the intensive care unit for a cardiac dysrhythmia. The nurse understands the prescribed calcium channel blocker has which of the following mechanisms of action?

Increases heart rate and increases myocardial contractility

Increase oxygen to the systemic circulation

Reduces the contractility and conductivity of the heart

Acts on the beta cells within the heart and lungs to regulate cardiac rhythm

Answer and Explanation

The Correct Answer is C

A. Calcium channel blockers primarily decrease heart rate and contractility, not increase them.

B. While they can indirectly improve oxygen supply by reducing myocardial oxygen demand, they do not directly increase systemic oxygen.

C. This option accurately describes the mechanism of action of calcium channel blockers, which decrease heart contractility and conduction through the AV node, helping to manage dysrhythmias.

D. Calcium channel blockers do not act on beta cells; they specifically inhibit calcium influx into cardiac and vascular smooth muscle cells.

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Free Nursing Study Resources

Correct Answer is ["675"]

Explanation

To calculate the dosage of vancomycin, we first convert the client's weight from pounds to kilograms, knowing that 1 kilogram is approximately 2.2 pounds. The client weighs 198 pounds, which is equivalent to about 90 kilograms (198 lb / 2.2). The prescribed dose is 15 mg/kg/day, so for a 90 kg individual, this would be 1350 mg/day (15 mg/kg * 90 kg). Since the dose is divided equally every 12 hours, the nurse would administer half of the daily dose every 12 hours, resulting in 675 mg per dose (1350 mg/day / 2). Therefore, the nurse should administer 675 mg of vancomycin with each dose.

A. Lung function test B. Platelet counts C. Liver function test D. Hemoglobin levels

Correct Answer is C

Explanation

A. Lung function tests are not relevant to atorvastatin therapy; they are more commonly associated with medications affecting the respiratory system.

B. Platelet counts are not routinely monitored for patients on atorvastatin unless there are specific concerns related to bleeding or clotting.

C. Liver function tests are critical for patients on atorvastatin because the medication can cause liver enzyme elevations, indicating potential hepatotoxicity. Routine monitoring ensures early detection of any liver complications.

D. Hemoglobin levels are not specifically related to atorvastatin use and are generally monitored in contexts involving anemia or bleeding.

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A nurse is caring for a client admitted to the intensive care unit for a cardiac dysrhythmia. The nurse understands the prescribed calcium channel blocker has which of the following mechanisms of action?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A nurse prepares to administer vancomycin 15 mg/kg/day divided equally every 12 hr. The client weighs 198 lb. How many mg should the nurse administer with each dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

Correct Answer is ["675"]

Explanation

The nurse is caring for a client who is taking atorvastatin (Lipitor) to assist in lowering his LDL cholesterol. Which lab value must be routinely done with this medication to prevent complications?

Correct Answer is C

Explanation

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A nurse is caring for a client admitted to the intensive care unit for a cardiac dysrhythmia. The nurse understands the prescribed calcium channel blocker has which of the following mechanisms of action?

A charge nurse is teaching a group of nurses about the antagonist action of reversal medications. For each medication listed below, click to specify the expected reversal agent.

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