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
Explanation
This indicates that the child may be experiencing hemorrhage because they are trying to clear the blood from their throat. Frequent swallowing is one of the initial signs of bleeding immediately after tonsillectomy.
Choice A is wrong because elevated pain level is not a specific sign of hemorrhage. Pain is expected after a tonsillectomy and can be managed with medication and fluids.
Choice B is wrong because increased drowsiness is not a specific sign of hemorrhage. Drowsiness can be caused by anesthesia, medication, or dehydration.
Choice D is wrong because diminished breath sounds are not a specific sign of hemorrhage. Diminished breath sounds can be caused by respiratory infection, asthma, or bronchospasm.
Normal ranges for hemoglobin and hematocrit are 11.5 to 15.5 g/dL and 34 to 45% for children, respectively.
Normal ranges for platelet count are 150,000 to 450,000/mm3 for both children and adults. Normal ranges for plasma clotting variables depend on the specific test and method used.
Correct Answer is B
Explanation
Advance directives are legal documents that allow a person to express their wishes for medical care in case they become incapacitated or unable to communicate. They do not require a lawyer or a notary to be valid, as long as they follow the state laws and are signed by the person and two witnesses.
Choice A is wrong because it implies that legal representation is necessary for advance directives, which is not true.
A social worker can help the client with other resources or support, but not with finding a lawyer for this purpose.
Choice C is wrong because it suggests that advance directives can be verbal, which is not true. Advance directives must be written and signed to be legally binding.
Verbal agreements may not be honored or remembered by the provider or the family.
Choice D is wrong because it implies that advance directives need legal review, which is not true. Advance directives are personal decisions that do not need to be approved by a lawyer or a court.
Legal review may be helpful in some cases, but it is not mandatory or essential.
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