An adult client with third-degree AV block is admitted to the cardiac care unit and placed on continuous cardiac monitoring. What rhythm characteristic will the ECG most likely show?
History of type 2 diabetes
Interval and RR interval are irregular
Shortened PR interval
Inconsistently shaped P waves
PR interval is constant.
Apical heart rate
Fewer QRS complexes than P waves
PP interval is equal to RR interval.
Correct Answer : G
A. History of type 2 diabetes is not a rhythm characteristic seen on an ECG. While diabetes can contribute to the development of cardiovascular issues, it does not specifically describe the characteristics of a third-degree AV block on an ECG.
B. Interval and RR interval are irregular is incorrect. In third-degree AV block (also known as complete heart block), the atrial rate and ventricular rate are typically regular, but the atrial and ventricular rhythms are completely dissociated.
C. Shortened PR interval is incorrect. In third-degree AV block, there is no consistent PR interval because the atria and ventricles are functioning independently.
D. Inconsistently shaped P waves is incorrect. P waves may appear normal, but the relationship between P waves and QRS complexes is lost in third-degree AV block.
E. PR interval is constant is incorrect. In third-degree AV block, the PR interval is inconsistent or absent, as the atrial and ventricular rates are independent of each other.
F. Apical heart rate is irrelevant here. The ECG will show the characteristic findings of third-degree AV block rather than focusing on apical heart rate alone.
G. Fewer QRS complexes than P waves is correct. In third-degree AV block, the atrial impulses (P waves) are conducted normally, but the ventricles are completely dissociated from the atrial rhythm, leading to fewer QRS complexes than P waves, as the ventricles may be paced by an escape rhythm.
H. PP interval is equal to RR interval is not necessarily true in third-degree AV block. The PP and RR intervals may be different depending on the escape rhythm, but they are not usually exactly equal.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","D","E"]
Explanation
A. Removing tight clothing is correct because it allows for better heat dissipation and helps cool the patient.
B. Administering acetaminophen is incorrect as acetaminophen reduces fever from infection, not from heat stroke, which requires active cooling measures.
C. Giving salt tablets is incorrect as rapid sodium replacement can cause dangerous fluid shifts; IV fluids are preferred for controlled electrolyte correction.
D. Placing in cool water is correct because immersion cooling is one of the most effective methods to lower body temperature in heat stroke.
E. Initiating IV fluids is correct as the patient likely has dehydration and electrolyte imbalances, requiring fluid resuscitation with isotonic fluids.
Correct Answer is C
Explanation
A. Low levels of both HDL and LDL cholesterol is not desirable as low levels of HDL cholesterol are associated with a higher risk for heart disease.
B. Low levels of high-density lipoprotein (HDL cholesterol) are undesirable because HDL helps remove excess cholesterol from the bloodstream, and lower levels increase the risk of cardiovascular disease.
C. Low levels of low-density lipoprotein (LDL cholesterol) is the most desirable situation. Lower LDL levels reduce the risk of atherosclerosis and heart disease, making it important to lower these levels in patients with coronary artery disease.
D. Hypocholesterolemia (abnormally low cholesterol levels) is not typically targeted as a treatment goal and can be harmful in some situations, as cholesterol is essential for many bodily functions.
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