The nurse is caring for a client in the coronary care unit and the monitor depicts the rhythm shown below. What is the nurse’s interpretation of this rhythm?
Second degree AV block- Mobitz II
Sinus bradycardia with first degree AV block
Second degree AV block- Mobitz I
Third degree heart block
The Correct Answer is C
A. Mobitz II is a type of second-degree AV block characterized by constant PR intervals and sudden dropped QRS complexes (i.e., the PR interval does not lengthen progressively). This is a more serious block because the dropped beats are unpredictable and could lead to complete block.
B. Sinus bradycardia is a slower-than-normal heart rate (usually less than 60 beats per minute) that originates from the sinus node. First-degree AV block is characterized by a prolonged PR interval, but unlike second-degree block, there are no dropped QRS complexes.
C. Mobitz I (Wenckebach) is a second-degree AV block where the PR interval gradually lengthens with each successive beat until a QRS complex is dropped. After the dropped beat, the cycle repeats. This is a relatively benign block and often resolves without intervention, though it requires monitoring.
D. Third-degree heart block (also known as complete heart block) occurs when there is no communication between the atria and ventricles. The atria and ventricles beat independently of each other. There are no relationship between the P waves and QRS complexes, and the ventricular rate is typically slower than the atrial rate.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. The 20-gauge catheter in the right wrist is not ideal for blood transfusions, as wrist veins are smaller and may be less optimal for high-flow transfusions.
B. An 18-gauge catheter is appropriate for blood transfusions, but the catheter is currently in use for potassium chloride, which would need to be discontinued. The best choice is a separate site.
C. A 22-gauge catheter is not large enough for blood transfusion; it may cause hemolysis or slow the transfusion rate.
D. The 20-gauge catheter in the right forearm is an appropriate size for a blood transfusion and is currently infusing normal saline, which does not interfere with the blood transfusion.
Correct Answer is C
Explanation
A. “I probably will not have any transfusion reactions from my own blood.” - Autologous transfusions
generally have a lower risk of transfusion reactions because they involve the client’s own blood.
B. “This is the blood I’ve been giving for the past 6 weeks for myself.” - This is a correct understanding of the process of autologous blood donation, where the client donates blood for their own use.
C. An autologous blood transfusion involves the collection and storage of a patient's own blood for later transfusion. This significantly reduces the risk of bloodborne infections, such as hepatitis, HIV, and other blood-borne diseases, as the blood is coming from the patient themselves.
D. “Since I have O negative blood, it’s a good thing I’m getting my own blood.” - The client may not need additional teaching here because O negative blood is universally compatible, but the reason they are getting their own blood is due to the autologous donation process, not because of blood type.
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