A nurse in an urgent care center is assessing a client who reports a sudden onset of irregular palpitations, fatigue, and dizziness. The nurse finds a rapid and irregular heart rate with a significant pulse deficit. Which of the following dysrhythmias should the nurse expect to find on the ECG?

Sinus bradycardia

Sinus tachycardia

Atrial fibrillation

First-degree AV block

Answer and Explanation

The Correct Answer is C

Choice A Reason: This is incorrect. Sinus bradycardia is a slow and regular heart rate that originates from the sinus node. It does not cause irregular palpitations, fatigue, or dizziness, unless the heart rate is very low or the client has underlying cardiac disease.

Choice B reason: This is incorrect. Sinus tachycardia is a fast and regular heart rate that originates from the sinus node. It may cause fatigue or dizziness, but not irregular palpitations or pulse deficit.

Choice C Reason: This is correct. Atrial fibrillation is a fast and irregular heart rate that originates from multiple foci in the atria. It causes irregular palpitations, fatigue, dizziness, and pulse deficit due to ineﬀective atrial contractions and variable ventricular response.

Choice D Reason: This is incorrect. First-degree AV block is a delay in the conduction of impulses from the atria to the ventricles. It does not aﬀect the heart rate or rhythm, and does not cause any symptoms.

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Correct Answer is B

Explanation

Choice A Reason: This is incorrect. Widening pulse pressure is not a sign of hypovolemic shock, but rather of increased intracranial pressure or aortic regurgitation. Hypovolemic shock causes narrowing pulse pressure due to decreased stroke volume and increased peripheral resistance.

Choice B Reason: This is correct. Increased heart rate is a sign of hypovolemic shock, as the body tries to compensate for the decreased blood volume and cardiac output by increasing the heart rate and contractility.

Choice C Reason: This is incorrect. Increased deep tendon reﬂexes are not a sign of hypovolemic shock, but rather of hyperreﬂexia or tetany. Hypovolemic shock causes decreased deep tendon reﬂexes due to reduced perfusion and oxygenation of the muscles and nerves.

Choice D Reason: This is incorrect. Pulse oximetry 96% is not a sign of hypovolemic shock, but rather of normal oxygen saturation. Hypovolemic shock causes decreased pulse oximetry due to hypoxia and impaired gas exchange.

A. Elevate the client’s feet. B. Administer a unit of packed RBCs. C. Initiate a dopamine IV infusion for the client. D. Increase the client’s IV ﬂuid rate.

Correct Answer is D

Explanation

Choice a) is incorrect because elevating the client’s feet is not the priority action for a hypotensive client. Elevating the client’s feet may help increase the venous return to the heart, but it may also compromise the respiratory status of a client who has esophageal varices and is at risk of aspiration.

Choice b) is incorrect because administering a unit of packed RBCs is not the priority action for a hypotensive client. Administering a unit of packed RBCs may help increase the oxygen-carrying capacity of the blood, but it may also increase the blood viscosity and pressure, which can worsen the bleeding from the esophageal varices.

Choice c) is incorrect because initiating a dopamine IV infusion for the client is not the priority action for a hypotensive client. Initiating a dopamine IV infusion may help increase the blood pressure and cardiac output, but it may also cause vasoconstriction and tachycardia, which can increase the risk of hemorrhage and arrhythmias.

Choice d) is correct because increasing the client’s IV ﬂuid rate is the priority action for a hypotensive client. Increasing the client’s IV ﬂuid rate may help restore the intravascular volume and perfusion, which can prevent shock and organ damage. Increasing the client’s IV ﬂuid rate may also dilute the blood and reduce its viscosity and pressure, which can decrease the bleeding from the esophageal varices.

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A nurse in an urgent care center is assessing a client who reports a sudden onset of irregular palpitations, fatigue, and dizziness. The nurse finds a rapid and irregular heart rate with a significant pulse deficit. Which of the following dysrhythmias should the nurse expect to find on the ECG?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

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Correct Answer is B

Explanation

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Correct Answer is D

Explanation

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