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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.

Answer and Explanation

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.

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Correct Answer is C

Explanation

A. Excessive fluid losses may lead to dehydration, but this is not typically a primary concern for patients with pulmonary alterations unless there is significant vomiting, diarrhea, or blood loss.
B. Hemodilution is not a common concern in patients with pulmonary alterations. Hypernatremia typically occurs with fluid loss or inadequate fluid intake, but it is not a direct concern related to pulmonary issues.
C. Fluid volume excess can lead to right-sided heart failure in patients with pulmonary alterations. If fluid accumulates, it can worsen pulmonary symptoms and increase the workload on the heart, potentially leading to right-sided heart failure.
D. Fluid retention with tachypnea is not typically a direct cause of fluid retention. While tachypnea is associated with respiratory distress, fluid retention is more closely linked to heart failure or kidney dysfunction.

A. Administering aspirin to the patient B. Providing oral fluids C. Applying a cooling blanket D. Giving salt tablets to the patient

Correct Answer is C

Explanation

A. Administering aspirin is incorrect because aspirin is ineffective in reducing core temperature in heat stroke and can increase the risk of bleeding.
B. Providing oral fluids is incorrect because the patient is confused and at risk for aspiration; IV fluids are preferred.
C. Applying a cooling blanket is correct because this patient is experiencing heat stroke, and rapid cooling is essential to prevent organ damage. Cooling blankets, ice packs, and immersion in cool water are key interventions.
D. Giving salt tablets is incorrect as rapid sodium replacement can cause fluid shifts and worsen the condition; IV fluids are preferred.

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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?

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