A nurse is reviewing a client’s cardiac rhythm strips and notes a constant P-R interval of 0.35 seconds.
Which of the following dysrhythmias is the client displaying?
Atrial fibrillation.
Complete heart block.
First-degree atrioventricular block.
Premature atrial complexes.
The Correct Answer is C
This is because the PR interval is longer than normal, which indicates a delay in the conduction of electrical impulses from the atria to the ventricles through the AV node. A normal PR interval is 0.12 to 0.2 seconds, or 3 to 5 small squares on the EKG strip. In this case, the PR interval is 0.35 seconds, which is more than 5 small squares.
Choice A is wrong because atrial fibrillation is a type of arrhythmia where the atria beat irregularly and rapidly, producing chaotic and variable P waves and an irregular ventricular response.
There is no constant PR interval in atrial fibrillation.
Choice B is wrong because complete heart block is a type of arrhythmia where there is no conduction of electrical impulses from the atria to the ventricles, resulting in independent and dissociated atrial and ventricular rhythms.
There are no consistent P waves or PR intervals in complete heart block.
Choice D is wrong because premature atrial complexes are extra beats that originate from the atria and interrupt the normal sinus rhythm.
They produce abnormal P waves that are different from the sinus P waves, and may have a shorter or longer PR interval depending on the timing of the impulse.
However, they do not cause a constant prolongation of the PR interval.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["C","E"]
Explanation
A urine culture is indicated for the client who has lower back pain and pinkish vaginal discharge, as these symptoms may suggest a urinary tract infection (UTI). A urine culture can identify the causative organism and guide the appropriate antibiotic therapy.
Phenazopyridine is a urinary analgesic that can relieve pain, burning, and urgency associated with a UTI. However, it requires a provider prescription and should not be used for more than two days.
A vaginal culture is not necessary for this client, as the vaginal discharge is likely due to the cervical changes during labor. A vaginal culture may be indicated for clients who have signs of vaginitis, such as itching, odor, or abnormal color of the discharge.
Obtaining a provider prescription for antibiotics is premature for this client, as the urine culture results are not available yet. Antibiotics should be prescribed based on the sensitivity of the organism causing the UTI.
Ibuprofen 600 mg every 6 hr for mild to moderate pain is not appropriate for this client, as it may interfere with uterine contractions and prolong labor. Ibuprofen is also contraindicated in the third trimester of pregnancy due to the risk of premature closure of the ductus arteriosus in the fetus. The nurse should use nonpharmacological methods to relieve the client’s back pain, such as massage, heat, or position changes.
Correct Answer is C
Explanation
The correct answer is c. Remove the cap and place it sterile-side up on a clean surface.
Choice A rationale:
Placing sterile gauze over areas of spilled solution within the sterile field is incorrect. If solution is spilled within the sterile field, the entire field should be considered contaminated and a new sterile field should be set up
Choice B rationale:
Holding the irrigation solution bottle with the label facing away from the palm of the hand is incorrect. The label should face the palm of the hand to avoid contamination of the sterile field
Choice C rationale:
Removing the cap and placing it sterile-side up on a clean surface is correct. This ensures that the sterile side of the cap remains sterile and can be used to recap the bottle after pouring the solution
Choice D rationale:
Holding the bottle in the center of the sterile field when pouring the solution is incorrect. The bottle should be held over the edge of the sterile field to avoid contamination of the field if solution spills
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