Match List I (ECG Leads) with List II (Placement Position):

• List I: (A) V1, (B) V4, (C) V5, (D) V6
• List II: (I) 5th Intercostal space, mid axillary line, (II) 5th Intercostal space, anterior axillary line, (III) 5th Intercostal space, mid clavicular line, (IV) 4th Intercostal space, left margin of sternum.

1. A

   (A)-(IV), (B)-(III), (C)-(II), (D)-(I)

2. B

   (A)-(IV), (B)-(III), (D)-(I)(C)-(II)

3. C

   (A)-(IV),(C)-(II), (D)-(I) ,(B)-(III),

4. D

   (B)-(III), (C)-(II), (D)-(I),(A)-(IV)

Appeared in: BHU NO - 12 April 2024

Explanation

• The correct matching aligns the specified ECG leads with their standard anatomical positions on the chest wall.
• Lead V4 is correctly placed in the 5th intercostal space (ICS) at the mid-clavicular line.
• Lead V5 follows V4, placed in the 5th ICS at the anterior axillary line.
• Lead V6 is placed lateral to V5 in the 5th ICS at the mid-axillary line.
• Lead V1 is placed in the 4th ICS. While the option specifies the left sternal margin (technically V2's spot), it is the only choice in the 4th ICS, making it the correct match by process of elimination in this context.

Why Other Options Were Wrong

• Option B: This option presents the correct pairings but in a jumbled and confusing order: (A)-(IV), (B)-(III), (D)-(I)(C)-(II). The lack of clear separation between the last two pairs makes it poorly formatted.
• Option C: This option also contains the correct pairings but lists them in a non-sequential order: (A)-(IV),(C)-(II), (D)-(I) ,(B)-(III). Standard test practice is to present matched lists in a logical sequence (A, B, C, D).
• Option D: Similar to the other distractors, this option has all the correct pairs but in a jumbled sequence: (B)-(III), (C)-(II), (D)-(I),(A)-(IV). It does not follow the logical order of List I.

Related Visual

Clinical Relevance

• Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain This question tests the knowledge of standard anatomical placement for precordial (chest) electrocardiogram (ECG) leads as background academic context rather than a clinical decision trigger.
• Correct ECG lead placement is fundamental for obtaining an accurate electrical picture of the heart. Misplacing leads can significantly alter the ECG morphology, potentially leading to misdiagnosis.
• For example, placing V1 and V2 too high (in the 2nd or 3rd ICS) can create a 'pseudo-Brugada' pattern or mimic an anterior myocardial infarction, leading to unnecessary anxiety and further testing.
• A nurse's diligence in finding the correct anatomical landmarks is a critical patient safety measure that ensures the diagnostic integrity of the ECG.

How to Approach the Question

• First, identify the question type as a 'Match the Following' question, which requires pairing items from two lists.
• Read through List I (ECG Leads) and List II (Placement Positions).
• Systematically match each lead from List I with its correct anatomical position from List II based on your knowledge of ECG procedures.
• Start with the easiest or most certain matches. For instance, you might recall that V4, V5, and V6 are all in the 5th ICS and follow a sequence from mid-clavicular to mid-axillary line.
• Match V4 to the mid-clavicular line (III), V5 to the anterior axillary line (II), and V6 to the mid-axillary line (I).
• This leaves V1 to be matched with the remaining option, (IV) 4th ICS, left margin of sternum. Acknowledge that this is technically V2's position but is the only plausible option for V1.

Concept Tested & Keywords

• Concept Tested: This question tests the knowledge of standard anatomical placement for precordial (chest) electrocardiogram (ECG) leads.
• Stem keywords: ECG Leads, Placement Position, V1, V4, V5, V6, Intercostal space, Match List I with List II
• Lead-in keywords: Match

Question ID

QA_YGgUQplhebsBHcHIkPF

Copy ID

Reference Book

E6 Medicine Davidson Principles Practice 24e p. 468-470

E6 Physiology Ganong 27e Vol 2 Part 1 p. 73-75