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 B
Explanation
Exercise can help stimulate bowel movements and prevent constipation, which is a common side effect of opioid medications. Exercise can also improve blood circulation, reduce stress, and enhance mood, which can benefit clients who have chronic pain.
Choice A is wrong because decreasing insoluble fiber intake can worsen constipation. Insoluble fiber adds bulk to the stool and helps it pass more easily through the colon.
Clients who take opioid medications should increase their intake of insoluble fiber from sources such as whole grains, fruits, vegetables, nuts, and seeds.
Choice C is wrong because drinking less water can lead to dehydration and hardening of the stool, which can make it more difficult to pass.
Clients who take opioid medications should drink plenty of water to keep the stool soft and moist.
Choice D is wrong because taking a laxative every day can cause dependence, tolerance, and electrolyte imbalance.
Laxatives should be used only as a last resort and under the guidance of a health care provider.
Clients who take opioid medications should try other methods of preventing constipation first, such as increasing exercise, fiber, and water intake.
Correct Answer is B
Explanation
This is because epiglottitis is a life-threatening condition that can cause severe airway obstruction and respiratory distress in children. The nurse should monitor the child for signs of worsening breathing, such as stridor, cyanosis, restlessness, or drooling. The nurse should also be prepared to assist with intubation or tracheostomy if needed.
Choice A is wrong because assessing the child for frequent swallowing may increase the risk of vomiting and aspiration. Swallowing may also be difficult and painful for the child due to the inflammation of the epiglottis.
Choice C is wrong because suctioning the child’s oropharynx may cause more swelling and irritation of the epiglottis, or trigger a spasm that can close off the airway. The nurse should avoid any stimulation of the throat or mouth that may worsen the condition.
Choice D is wrong because administering pancreatic enzymes with meals is not relevant to epiglottitis. Pancreatic enzymes are used to treat cystic fibrosis, a genetic disorder that affects the lungs and digestive system. Epiglottitis is caused by a bacterial infection or an injury to the throat.
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