How Are You Hooked Up to an EKG?
Step-by-Step 12-Lead ECG Guide
A 12-lead ECG (electrocardiogram) records the heart’s electrical activity using 10 electrodes placed on the body. Correct placement is essential for accurate results. Here’s how medical professionals typically set it up:
1. Skin Preparation
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Expose the chest and limbs while ensuring patient comfort and privacy.
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Trim excess hair on the chest if necessary to prevent artifacts.
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Clean and prep the skin with alcohol pads, then lightly abrade the area to improve electrode adhesion and signal quality.
2. Placing the Limb Electrodes
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Right Arm (RA): Between right shoulder and wrist.
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Left Arm (LA): Between left shoulder and wrist.
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Right Leg (RL): Between right hip and ankle.
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Left Leg (LL): Between left hip and ankle.
👉 Tip: Avoid bony areas for better conductivity.
3. Placing the Chest (Precordial) Leads
To find correct chest positions, locate the Angle of Louis (sternal notch) and count ribs downward.
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V1: 4th intercostal space, right of sternum.
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V2: 4th intercostal space, left of sternum.
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V3: Midway between V2 and V4.
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V4: 5th intercostal space, left midclavicular line.
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V5: Same level as V4, along the anterior axillary line.
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V6: Same level as V4–V5, along the mid-axillary line.
4. Connecting and Running the ECG
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Attach wires from the electrodes to the ECG machine.
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Start the test: Ask the patient to remain still and breathe normally for ~10 seconds.
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Remove electrodes afterward and clean the skin gently.
