12 ECG Lead Placement Guide
The correct positioning of leads is essential to taking an accurate 12 lead resting ECG. Incorrect lead placement can cause a false diagnosis of infarction or negative changes on the ECG machine.
Download our free easy to use Lead Placement Guide, which explains the common position for each of the 10 leads on a 12 lead ECG:
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Along with correct lead placement, using high quality ECG electrodes, such as the Ambu SUPAtab, and regularly changing your crocodile clips will also help to improve the accuracy of your 12 lead ECGs.
Make sure to visit our 12 Lead ECG Tips page for more tips and advice when taking a resting ECG and if you experience any problems with any of your Numed diagnostic or waiting room equipment then visit our dedicated support section for more help and advice.
12 Lead ECG Placement Guide
The correct positioning of leads is essential to taking an accurate 12 lead resting ECG and incorrect placement of leads can lead to a false diagnosis of infarction or negative changes on the ECG. This guide explains the common position for each of the 10 leads on a 12 lead resting ECG.
| Electrode | Placement Area |
|---|---|
| V1 | Fourth intercostal space to the right of the sternum. |
| V2 | Fourth intercostal space to the left of the sternum. |
| V3 | Directly between leads V2 and V4. |
| V4 | Fifth intercostal space at midclavicular line. |
| V5 | Level with V4 at left anterior axillary line. |
| V6 | Level with V5 at the midaxillary line. (Directly under the midpoint of the armpit) |
R - Right arm
L - Left arm
F - Left leg
N - Right leg
