A nurse is interpreting the ECG strip of a client who has bradycardia. Which of the following cardiac components should the nurse identify as the role of the P wave?

Slow repolarization of ventricular Purkinje fibers

Atrial depolarization

Early ventricular repolarization

Ventricular depolarization

Answer and Explanation

The Correct Answer is B

The P wave is the first wave on the ECG strip and represents the electrical activity of the atria. It reﬂects the depolarization of the atrial myocardium, which is the process of changing the electrical charge of the cardiac cells from negative to positive, triggering a contraction. The P wave precedes the QRS complex, which represents ventricular depolarization, and the T wave, which represents ventricular repolarization.

The other options are not correct because:

a. Slow repolarization of ventricular Purkinje fibers. This statement is incorrect because it describes the U wave, which is a small and sometimes invisible wave that follows the T wave on the ECG strip. It reﬂects the repolarization of the ventricular Purkinje fibers, which are specialized cardiac cells that conduct electrical impulses to the ventricles. The U wave is more prominent in conditions that cause hypokalemia, such as diuretic use or vomiting.

c. Early ventricular repolarization. This statement is incorrect because it describes the ST segment, which is the ﬂat line between the QRS complex and the T wave on the ECG strip. It reﬂects the early phase of ventricular repolarization, which is the process of restoring the electrical charge of the cardiac cells to negative after a contraction. The ST segment can be elevated or depressed in conditions that cause myocardial ischemia or injury, such as angina or myocardial infarction.

d. Ventricular depolarization. This statement is incorrect because it describes the QRS complex, which is the largest and most visible wave on the ECG strip. It reﬂects the depolarization of the ventricular myocardium, which triggers a ventricular contraction. The QRS complex follows the P wave and precedes the T wave on the ECG strip.

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Correct Answer is ["125 mL\/hr"]

Explanation

To calculate the infusion rate, the nurse should use the following formula:

Infusion rate (mL/hr) = Volume (mL) / Time (hr)

Plugging in the given values, the nurse should get:

Infusion rate (mL/hr) = 250 mL / 2 hr

Infusion rate (mL/hr) = 125 mL/hr

The nurse should round the answer to the nearest whole number and use a leading zero if it applies. Therefore, the nurse should set the IV pump to deliver 125 mL/hr.

A. Place a moist heating pad under the client's feet. B. Increase the client's oral ﬂuid intake. C. Obtain a pair of slipper-socks for the client. D. Rub the client's feet briskly for several minutes.

Correct Answer is C

Explanation

Obtaining a pair of slipper socks for the client is a simple and safe way to provide warmth and insulation to the feet, which can improve blood ﬂow and comfort.

Placing a moist heating pad under the client's feet is not recommended, as it can cause burns, vasodilation, or increased ﬂuid loss, which can worsen the condition.

Increasing the client's oral ﬂuid intake is not relevant, as it does not aﬀect the temperature or circulation of the feet.

Rubbing the client's feet briskly for several minutes is not advisable, as it can cause trauma, inﬂammation, or ulceration to the fragile skin and tissues of the feet.

Obtaining a pair of slipper socks for the client is a simple and safe way to provide warmth and insulation to the feet, which can improve blood ﬂow and comfort.

Placing a moist heating pad under the client's feet is not recommended, as it can cause burns, vasodilation, or increased ﬂuid loss, which can worsen the condition.

Increasing the client's oral ﬂuid intake is not relevant, as it does not aﬀect the temperature or circulation of the feet.

Rubbing the client's feet briskly for several minutes is not advisable, as it can cause trauma, inﬂammation, or ulceration to the fragile skin and tissues of the feet.

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A nurse is interpreting the ECG strip of a client who has bradycardia. Which of the following cardiac components should the nurse identify as the role of the P wave?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

Correct Answer is ["125 mL\/hr"]

Explanation

A nurse is caring for a client who has peripheral vascular disease and reports difficulty sleeping because of cold feet. Which of the following nursing actions should the nurse take to promote the client's comfort?

Correct Answer is C

Explanation

A nurse is planning care for a client following a cardiac catheterization accessed through his femoral artery. Which of the following actions should the nurse plan to take?

A nurse is assessing a client who has chronic venous insufficiency. Which of the following findings should the nurse expect?

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A nurse is caring for a client who has peripheral arterial disease (PAD). Which of the following symptoms should the nurse expect to find in the early stage of the disease?