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
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Rationale:
A. A weight gain of 0.5 kg (1 lb) in a week is not typically concerning for heart failure exacerbation.
B. Skipping a dose of a diuretic can lead to fluid retention and exacerbate heart failure symptoms.
C. Weighing daily is important for monitoring fluid retention, but the specific time of day is not as crucial as consistent timing.
D. A weight gain of 2 lbs. in 24 hours can indicate fluid retention and worsening heart failure.
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.
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