The nurse is caring for a client in the coronary care unit and the monitor depicts the rhythm shown below. What is the nurse’s interpretation of this rhythm?

Second degree AV block- Mobitz II

Sinus bradycardia with first degree AV block

Second degree AV block- Mobitz I

Third degree heart block

Answer and Explanation

The Correct Answer is C

A.   Mobitz II is a type of second-degree AV block characterized by constant PR intervals and sudden dropped QRS complexes (i.e., the PR interval does not lengthen progressively). This is a more serious block because the dropped beats are unpredictable and could lead to complete block.
B.   Sinus bradycardia is a slower-than-normal heart rate (usually less than 60 beats per minute) that originates from the sinus node. First-degree AV block is characterized by a prolonged PR interval, but unlike second-degree block, there are no dropped QRS complexes.
C.   Mobitz I (Wenckebach) is a second-degree AV block where the PR interval gradually lengthens with each successive beat until a QRS complex is dropped. After the dropped beat, the cycle repeats. This is a relatively benign block and often resolves without intervention, though it requires monitoring.
D.   Third-degree heart block (also known as complete heart block) occurs when there is no communication between the atria and ventricles. The atria and ventricles beat independently of each other. There are no relationship between the P waves and QRS complexes, and the ventricular rate is typically slower than the atrial rate.

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Correct Answer is D

Explanation

A. This would be concerning, but it is not the correct choice. If a pacemaker is functioning abnormally, it would require an assessment and troubleshooting, not simply a routine rhythm.
B. This is typical for biventricular pacemakers used in heart failure patients, but it would not apply to a patient with a standard pacemaker unless specified. A recent pacemaker placement does not necessarily indicate biventricular pacing.
C. This is correct if only the atrium is paced; however, in the case of a typical pacemaker like DDD (dual- chamber pacemaker), both the atrium and ventricle are paced.
D. This is correct for dual-chamber pacemakers (like DDD), which pace both the atrium and the ventricle to coordinate the heart's rhythm.

A. Perform carotid massage on the client B. Administer adenosine 12mg IV push STAT C. Prepare the client for electrical cardioversion D. Assess patient and obtain vital signs

Correct Answer is D

Explanation

A. Carotid massage can be used as a vagal maneuver for certain types of supraventricular tachycardia (SVT), particularly in stable patients. However, it is not recommended in cases where the patient has a history of cocaine use or is showing signs of instability because of the potential for triggering a serious event, like a stroke.
B. Adenosine is a medication commonly used for the treatment of SVT. However, it should be given with caution and only after assessing the patient's condition. In this case, the patient needs to be assessed first, including vital signs, level of consciousness, and overall stability, before any medications are administered.
C. Electrical cardioversion is indicated for unstable SVT (e.g., signs of hemodynamic instability such as hypotension, chest pain, or altered mental status). However, this patient is only reporting a "racing heart" and nervousness and has not yet been assessed for vital signs or other clinical symptoms.
D. The first step in this case should be to assess the patient's condition. This includes checking the vital signs, level of consciousness, and overall stability. Once this initial assessment is performed, the nurse can then determine whether medications or other interventions (like adenosine or cardioversion) are needed.

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LAB	Result	Normal Range
Potassium	2.8 mEq/L	3.5-5.3mEq/L
Sodium	133 mEq/L	135-145 mEqL
Chloride	90 mEq/L	97-107 mEqL
Glucose	200 mg/dL	70mg/dL to 110mg/dL
Magnesium	2.5 mg/dL	1.6-2.2 mg/dL
Calcium	8.0 mg/dL	8.2-10.2 mg/dL:

The nurse is caring for a client in the coronary care unit and the monitor depicts the rhythm shown below. What is the nurse’s interpretation of this rhythm?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

The nurse is assessing the client with a recent pacemaker placement. The client's monitor is displaying what type of rhythm?

Correct Answer is D

Explanation

A client presents to the Emergency Department (ED) complaining of a "racing" heart and nervousness. The client also admits to a history of cocaine abuse. The cardiac monitor displays the rhythm below. Which nursing intervention should the nurse perform?

Correct Answer is D

Explanation

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