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 A
Explanation
The correct answer is choice A. Limit oral feedings to 30 min in length.
This is because infants with heart failure have difficulty feeding and may become exhausted or dyspneic during prolonged feedings. By limiting the feeding time, the nurse can reduce the energy expenditure and caloric needs of the infant.
Choice B is wrong because weighing the infant every other day is not enough to monitor the fluid status and nutritional intake of the infant. The nurse should weigh the infant daily at the same time using the same scale.
Choice C is wrong because placing the infant in the prone position can compromise the respiratory function and increase the risk of sudden infant death syndrome (SIDS). The nurse should place the infant in a semi-Fowler’s position to facilitate breathing and decrease venous return.
Choice D is wrong because checking the infant’s oxygen saturation every 6 hr is not frequent enough to detect hypoxia or cyanosis. The nurse should monitor the oxygen saturation continuously or at least every 2 hr.
Correct Answer is C
Explanation
The correct answer is choice C: “Do you have thoughts of harming yourself?”.
This is the priority question for the nurse to ask the client because it assesses the client’s risk for suicide, which is a serious and potentially life-threatening complication of conduct disorder. The nurse should use a direct and nonjudgmental approach when asking about suicidal ideation and plan.
Choice A: “How do you get along with your peers at school?” is wrong because it is not the most urgent question to ask the client.
While it is important to assess the client’s social relationships and possible peer rejection, this can be done after addressing the client’s safety and mental status.
Choice B: “Do you have a criminal record?” is wrong because it is not relevant to the client’s current condition and might make the client feel defensive or stigmatized.
The nurse should avoid asking questions that imply blame or judgment and focus on the client’s strengths and coping skills.
Choice D: “How do you manage your behavior?” is wrong because it is not appropriate for the nurse to ask the client in an emergency department setting.
This question might imply that the client is responsible for their conduct disorder, which is a complex and multifactorial mental health condition. The nurse should collaborate with the client and their family to develop a behavior management plan that involves positive reinforcement, limit setting, and consistent consequences.
Normal ranges: According to the DSM-5, conduct disorder is characterized by a persistent pattern of behavior that violates the rights of others or societal norms.
The symptoms of conduct disorder include aggression, deceitfulness, destruction of property, serious rule violations, and lack of remorse.
Conduct disorder can cause significant impairment in social, academic, or occupational functioning. The prevalence of conduct disorder is estimated to be 4% among children and adolescents.
The risk factors for conduct disorder include genetic factors, neurobiological factors, environmental factors, and psychological factors.
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