Regarding the placement of leads when recording ECG all of the following are correct, EXCEPT:

AIIMS Jodhpur SNO-2023

Medical Surgical Nursing

Easy

Appeared in: AIIMS Jodhpur SNO-2023

Explanation

The question requires identifying the incorrect statement about ECG lead placement.
The statement describing the placement of the V4 lead is factually incorrect.
The correct anatomical landmark for the V4 lead is the 5th intercostal space (ICS) at the mid-clavicular line.
The option incorrectly states the 7th intercostal space. Placing the lead this low would significantly alter the ECG tracing and compromise its diagnostic value.

Option B: This statement is correct. The V3 lead is placed after V1, V2, and V4 are positioned, specifically at the midpoint on a straight line connecting V2 and V4.
Option C: This statement is correct. The V2 lead is placed in the 4th intercostal space, directly opposite V1 on the left side of the sternum.
Option D: This statement is correct. The V1 lead serves as the initial landmark and is placed in the 4th intercostal space at the right sternal border.

Visual 1: Diagram: Illustration of the human torso showing the precise anatomical landmarks and placement for all six precordial (chest) ECG leads (V1-V6). This visual helps in memorizing the correct positions.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Anatomical landmarks for precordial ECG lead placement as background academic context rather than a clinical decision trigger.
Accurate lead placement is a fundamental nursing skill and is critical for obtaining a diagnostically reliable ECG. Misplacing leads can alter QRS morphology and ST segments, potentially leading to misdiagnosis of conditions like myocardial infarction or ventricular hypertrophy.
A common error is placing the precordial leads too high on the chest, which can mimic signs of an anterior myocardial infarction. Always use anatomical landmarks (e.g., Angle of Louis to find the 2nd ICS) for accurate placement.
What if? If a patient has dextrocardia (heart on the right side of the chest), the precordial leads (V1-V6) must be placed on the right side of the chest in a mirror-image configuration of the standard placement to get an accurate reading. This should be clearly documented on the ECG strip.

How to Approach the Question

This is a knowledge-based question with a negative stem ('EXCEPT'), which asks you to find the false statement.
First, identify the core topic: the standard anatomical placement of precordial (chest) ECG leads.
Systematically review each option, recalling the correct landmark for each specific lead (V1, V2, V3, V4).
Evaluate each statement for factual accuracy. Remember: V1/V2 are in the 4th ICS; V4/V5/V6 are in the 5th ICS.
Identify the statement that contains an error. In this case, the intercostal space for V4 is incorrect.
The false statement is the correct answer to an 'EXCEPT' question.

Concept Tested & Keywords

Concept Tested: Anatomical landmarks for precordial ECG lead placement
Stem keywords: ECG, leads, placement, recording
Lead-in keywords: EXCEPT
Negative lead-in flag: The question asks for the INCORRECT statement (exception).

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