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 A
Explanation
Rationale:
A. Petechiae are small, pinpoint red or purple spots on the skin that may indicate bleeding or thrombocytopenia, which can be a side effect of heparin therapy.
B. Slowing pulse rate is not typically associated with heparin therapy.
C. Confusion is not typically associated with heparin therapy.
D. Pruritus (itching) is not typically associated with heparin therapy.
Correct Answer is A
Explanation
Rationale:
A. An echocardiogram is a diagnostic test that uses sound waves to create images of the heart's chambers, valves, and surrounding structures, and assesses their function.
B. Fasting is not typically required for an echocardiogram.
C. Discomfort is not typically associated with an echocardiogram.
D. An echocardiogram does not typically assess the extent of blockages in the arteries.
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