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A nurse is reviewing cardiac rhythms and heart blocks for a critical care course. The nurse is aware that which of the following describes first degree heart block?

The PR interval gets longer then drops.

PR interval greater than 0.20 seconds in duration

There are absent P waves

R-R is irregular

Answer and Explanation

The Correct Answer is B

Rationale:

A. This describes a second-degree heart block, specifically Mobitz Type I (Wenckebach).

B. A PR interval greater than 0.20 seconds is characteristic of first-degree heart block.

C. This describes third-degree heart block, also known as complete heart block.

D. An irregular R-R interval is not specific to first-degree heart block.

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Correct Answer is D

Explanation

Rationale:

A. Synchronized cardioversion is not appropriate for pulseless ventricular tachycardia.

B. A repeat ECG is not necessary for pulseless ventricular tachycardia.

C. Assessment of blood pressure is not the priority in pulseless ventricular tachycardia.

D. Immediate defibrillation is the priority in pulseless ventricular tachycardia to restore a perfusing rhythm.

A. Amiodarone administration B. Synchronized Cardioversion C. Epinephrine administration D. Defibrillation

Correct Answer is D

Explanation

Rationale:

A. Amiodarone administration is used for the treatment of ventricular fibrillation (VF) and ventricular tachycardia (VT) that is unresponsive to cardioversion.

B. Synchronized Cardioversion is used for the treatment of atrial fibrillation (AF), atrial flutter (AFL), and unstable ventricular tachycardia (VT).

C. Epinephrine administration is part of the ACLS algorithm for the treatment of VF and pulseless VT. It is given after defibrillation.

D. Defibrillation is the immediate treatment for ventricular fibrillation (VF) and pulseless ventricular tachycardia (VT).

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A nurse is reviewing cardiac rhythms and heart blocks for a critical care course. The nurse is aware that which of the following describes first degree heart block?

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Naxlex Comprehensive Predictor Exams

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