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 {"A":{"answers":"A"},"B":{"answers":"B"},"C":{"answers":"A"},"D":{"answers":"A"},"E":{"answers":"B"}}
Explanation
Answer is… Stay with the client for the first 15 min of the transfusion and Document the blood product transfusion in the client’s medical record are indicated nursing actions for the client. Obtain the first unit of packed RBCs from the blood bank is also indicated, but it should be done before starting the transfusion. Titrate the rate of infusion to maintain the client’s blood pressure at least 90/60 mm Hg and Start an IV bolus of lactated Ringer’s solution are not indicated nursing actions for the client.
Explanation:.
- Staying with the client for the first 15 min of the transfusion is indicated because this is when most adverse reactions occur and the nurse should monitor the client’s vital signs and symptoms closely.
- Documenting the blood product transfusion in the client’s medical record is indicated because this is part of the legal and ethical responsibility of the nurse and it provides a record of the type, amount, duration, and outcome of the transfusion.
- Obtaining the first unit of packed RBCs from the blood bank is indicated because this is part of the preparation for the transfusion and it ensures that the blood product is compatible, fresh, and available. However, this should be done before starting the transfusion, not after.
- Titrating the rate of infusion to maintain the client’s blood pressure at least 90/60 mm Hg is not indicated because this may cause fluid overload or hemolysis in the client who already has a low blood pressure and a high heart rate. The rate of infusion should be based on the client’s condition, weight, and response to the transfusion, not on a fixed target.
- Starting an IV bolus of lactated Ringer’s solution is not indicated because this may cause electrolyte imbalance or hemolysis in the client who already has a positive H. pylori test and a history of gastrointestinal bleeding. The only fluid that should be infused with blood products is 0.9% NaCl (normal saline) because it has a similar osmolarity and pH as blood and it prevents clotting or hemolysis.
Correct Answer is C
Explanation

This is because varicella, or chickenpox, is a highly contagious disease caused by the varicella- zoster virus (VZV), which can spread through the air or by direct contact with the fluid from the blisters. A negative air pressure room prevents the air from the room from circulating to other areas of the hospital, reducing the risk of transmission to other patients and staff.
Choice A is wrong because aspirin should not be given to children with chickenpox, as it can cause a serious condition called Reye’s syndrome, which affects the brain and liver. Instead, acetaminophen can be used to reduce fever.
Choice B is wrong because droplet precautions are not enough to prevent the spread of chickenpox. Droplet precautions involve wearing a mask and gloves when in close contact with the patient, but they do not prevent the virus from traveling through the air. Airborne precautions, which include a negative air pressure room and wearing a respirator, are needed for chickenpox.
Choice D is wrong because Koplik spots are not a sign of chickenpox, but of measles, another viral infection that causes a rash. Chickenpox causes an itchy rash with small, fluid-filled blisters that crust over.
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