To optimize patient outcomes for a patient with complete heart block, the nurse would prepare to which one of the following?

Appeared in: RAK Nursing Officer - 2019

Explanation

Complete heart block (3rd-degree AV block) involves a complete dissociation of atrial and ventricular electrical activity, leading to severe bradycardia.
This profound bradycardia compromises cardiac output, causing symptoms like syncope, dizziness, and shortness of breath.
The definitive treatment is to electrically pace the ventricles to restore an adequate heart rate and ensure sufficient blood circulation.
Temporary pacing (transcutaneous or transvenous) is the immediate intervention to stabilize the patient until a permanent pacemaker can be implanted.

Option A: Adenosine slows conduction through the AV node. In complete heart block, this action is contraindicated as it can worsen the block and lead to asystole.
Option B: Lidocaine is an antiarrhythmic used to suppress ventricular ectopy and treat ventricular tachycardia. It has no role in treating bradycardia or AV blocks.
Option C: Defibrillation is a high-energy shock used to terminate chaotic, pulseless rhythms like ventricular fibrillation (VF) or pulseless VT. It is not indicated for organized rhythms like complete heart block, which typically has a pulse.

Clinical Relevance

Nursing practice connection: Use the key finding related to Management of Complete Heart Block (Third-Degree AV Block) to guide bedside assessment, documentation, and the next nursing action.
A nurse must be able to rapidly identify the signs of unstable bradycardia (hypotension, altered mental status, signs of shock, ischemic chest discomfort) and prepare for immediate intervention.
The nurse's role includes applying transcutaneous pacing pads proactively, ensuring patent IV access, and having emergency medications and equipment ready.
What if the patient with complete heart block is asymptomatic and hemodynamically stable? The situation is still a high-risk emergency. While immediate pacing might not be needed in the next second, the patient requires continuous monitoring in a critical care setting, and preparations for pacemaker insertion should still be made urgently, as deterioration can be sudden and catastrophic.

How to Approach the Question

First, identify the core clinical problem from the question stem: 'complete heart block'.
Recall the pathophysiology of complete heart block: a total failure of AV conduction, leading to severe bradycardia.
Analyze the goal: 'optimize patient outcomes'. This implies a life-saving or stabilizing intervention.
Evaluate each option based on its mechanism of action and indication.
Eliminate adenosine because it blocks the AV node, which would worsen the condition.
Eliminate lidocaine because it's for ventricular tachyarrhythmias, not bradycardia.

Concept Tested & Keywords

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E6 Medicine Davidson Principles Practice 24e p. 502-504

E6 Medicine Harrison 22e Part 2 p. 29-31

E6 Medicine Harrison 22e Part 1 p. 1958-1960

Practise the full RAK Nursing Officer - 2019

Attempt every question from this paper in a timed mock, then review the full solution for each one.