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 D
Explanation
This statement indicates that the client understands the importance of reducing swelling and inflammation in the affected hand after carpal tunnel surgery.
Elevation promotes venous return and prevents fluid accumulation in the tissues.
Choice A is wrong because applying heat for the first 24 hours can increase blood flow and swelling in the hand, which can cause more pain and delay healing. Ice packs are recommended for the first 24 to 48 hours to reduce inflammation.
Choice B is wrong because the client should not avoid using the affected hand for 4 to 6 weeks, as this can lead to stiffness, muscle atrophy, and decreased range of motion. The client should move the fingers periodically and perform gentle exercises as prescribed by the surgeon or physical therapist.
Choice C is wrong because numbness and tingling in the hand are signs of nerve compression, which is the main cause of carpal tunnel syndrome.
The client should expect these symptoms to improve or resolve after surgery, not persist or worsen. If the client experiences numbness and tingling after surgery, they should report it to the surgeon as it may indicate a complication such as nerve injury or hematoma.
Normal ranges for grip strength, pinch strength, and key pinch strength vary depending on age, sex, and hand dominance. However, a general reference for grip strength is 20 to 40 kg for men and 15 to 30 kg for women. For pinch strength, it is 6 to 12 kg for men and 5 to 10 kg for women. For key pinch strength, it is 4 to 8 kg for men and 3 to 7 kg for women.
These values may be lower in older adults or people with chronic conditions.
The client should expect some loss of strength in the affected hand after surgery, but it should gradually improve with rehabilitation.
Correct Answer is A
Explanation
The correct answer is choicea. Swelling of the face.
Choice A rationale:
Swelling of the face can be a sign of preeclampsia, a serious condition that requires immediate medical attention.Preeclampsia can lead to complications for both the mother and the baby if not managed properly.
Choice B rationale:
Urinary frequency is a common symptom during pregnancy due to hormonal changes and the growing uterus pressing on the bladder.It is generally not a cause for concern unless accompanied by other symptoms like pain or burning during urination.
Choice C rationale:
Faintness upon rising, also known as orthostatic hypotension, is common in pregnancy due to changes in blood circulation.It can often be managed by rising slowly and ensuring adequate hydration.
Choice D rationale:
Bleeding gums are common during pregnancy due to hormonal changes that increase blood flow to the gums, making them more sensitive and prone to bleeding.Good oral hygiene can help manage this symptom.
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