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
- . Answer and explanation.
The correct answer is choice C, first-degree atrioventricular block.
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 is a sign of preeclampsia, a serious complication of pregnancy that can cause high blood pressure, proteinuria, and seizures.

Preeclampsia can affect the placenta, the kidneys, the liver, and the brain of the mother and the fetus. It requires immediate medical attention and may lead to early delivery.
Choice A, bleeding gums, is wrong because it is a common occurrence during pregnancy due to hormonal changes that increase blood flow to the gums. It is not a cause for concern unless it is excessive or accompanied by other symptoms.
Choice B, urinary frequency, is wrong because it is also a normal finding during pregnancy due to the growing uterus putting pressure on the bladder. It is not a sign of infection or kidney problems unless it is associated with pain, burning, or blood in the urine.
Choice D, faintness upon rising, is wrong because it is usually caused by orthostatic hypotension, a drop in blood pressure when changing positions.
This can happen during pregnancy due to the dilation of blood vessels and the increased blood volume. It can be prevented by rising slowly, drinking enough fluids, and avoiding prolonged standing.
Correct Answer is B
Explanation
The correct answer is B.
Assist the adolescent in applying for Medicaid.
This action demonstrates the nurse’s role as an advocate and a resource person for the client, who might be eligible for financial assistance and health care coverage during her pregnancy and postpartum period. Medicaid is a federal and state program that provides health insurance for low-income individuals and families.
Choice A is wrong because contacting the adolescent’s parent for assistance might violate the client’s confidentiality and autonomy, especially if the parent is not aware of or supportive of the pregnancy. The nurse should respect the client’s right to privacy and self-determination, unless there is a risk of harm to the client or the fetus.
Choice C is wrong because referring the adolescent to a local mental health clinic might imply that the client has a mental disorder or needs psychological counseling, which could be stigmatizing and discouraging.
The nurse should assess the client’s emotional state and coping skills, and provide supportive and nonjudgmental care. The nurse can also offer referrals to other community resources, such as prenatal education, parenting classes, or social services, that might benefit the client.
Choice D is wrong because advising the adolescent to place the newborn for adoption might interfere with the client’s decision-making process and personal values.
The nurse should not impose his or her own opinions or beliefs on the client, but rather explore the client’s feelings and preferences about her pregnancy options. The nurse should provide factual information and education about adoption, abortion, or parenting, and help the client weigh the benefits and risks of each option.
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