NORCET 2 - 2021 (shif…: Just before cardiac arrest, which ECG abnormality is seen in the patient?

NORCET 2 - 2021 (shift-1)

Medical & Surgical Nursing

Hard

Appeared in: NORCET 2 - 2021 (shift-1)

Explanation

The ECG image shows classic signs of Ventricular Tachycardia (VT): a rapid rate (150-250 bpm), regular rhythm, and wide QRS complexes (>0.12s).
VT is a life-threatening dysrhythmia because it drastically reduces cardiac output and is a direct precursor to Ventricular Fibrillation (VF).
VF is a non-perfusing rhythm that causes cardiac arrest. Therefore, identifying and treating VT promptly is critical to prevent cardiac arrest.
According to ACLS (Advanced Cardiac Life Support) protocols, pulseless VT is a shockable rhythm, highlighting its severity and proximity to cardiac arrest.

Option A: Atrial Fibrillation (AF) is characterized by an 'irregularly irregular' rhythm with narrow QRS complexes. While it can lead to complications, it is not the typical arrhythmia seen immediately preceding cardiac arrest.
Option C: 'Dysrhythmia' is a general term for any abnormal heart rhythm. While VT is a type of dysrhythmia, this option is not specific enough. In clinical questions, the most precise answer is required.
Option D: 'Irregular Dysrhythmia' is also a non-specific term. Furthermore, the VT shown in the image is typically regular, not irregular. This option is both vague and descriptively inaccurate for the provided ECG.

Clinical Relevance

Nursing practice connection: Prioritize focused assessment, early escalation, and real-time monitoring when managing Identification of life-threatening cardiac arrhythmias, specifically Ventricular Tachycardia (VT), as a precursor to cardiac arrest in acute care settings.
A nurse's ability to rapidly identify VT on a cardiac monitor is a critical skill. Immediate assessment of the patient's pulse and consciousness is the first step.
If the patient is pulseless, the nurse must initiate the code blue protocol, start high-quality CPR, and prepare for immediate defibrillation as per ACLS guidelines.
If the patient has a pulse but is unstable (e.g., hypotensive, altered mental status), the nurse should prepare for synchronized cardioversion.

How to Approach the Question

First, analyze the question stem to understand what is being asked. Here, the question asks for the ECG abnormality seen 'just before cardiac arrest'.
Next, carefully examine the provided image, which is an ECG strip. Identify the key features: rhythm (regular/irregular), rate (fast/slow), and QRS width (narrow/wide).
In this ECG, you see a very fast, regular rhythm with wide QRS complexes. This is the classic presentation of Ventricular Tachycardia (VT).
Evaluate the options based on your analysis. 'VT' is a specific option that perfectly matches the ECG.
Eliminate the other options. 'AF' has a different appearance (irregularly irregular, narrow QRS). 'Dysrhythmia' and 'Irregular Dysrhythmia' are too general and less precise than VT.
Conclude that VT is the most specific and correct answer, as it is a known life-threatening rhythm that frequently precedes cardiac arrest.

Concept Tested & Keywords

Concept Tested: Identification of life-threatening cardiac arrhythmias, specifically Ventricular Tachycardia (VT), as a precursor to cardiac arrest.
Stem keywords: cardiac arrest, ECG abnormality
Lead-in keywords: Just before
Clinical cues: The visual information from the ECG strip is the primary clinical cue, showing a wide-complex tachycardia.

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E6 Nursing Fundamentals Potter Perry 12e Part 4 p. 234-236

E6 Medicine Harrison 22e Part 1 pp. 1996-1998, 1997-1999