By using 6 chest electrodes, you get 6 transverse leads that provide information about the heart’s horizontal plane: V1, V2, V3, V4, V5, and V6. Like the augmented leads, the transverse leads are unipolar and requires only a positive electrode. The negative pole of all 6 leads is found at the center of the heart. This is calculated with the ECG.
Since you have placed lead V1, you can now put the electrode for lead V2 at the same level to the left side of the sternum (4th intercostal space, left sternal border). You could also follow the same instructions for V1, but again place the lead on the left side of the sternum. Placement of Lead V4 . V4 should be placed before lead V3.
ECG Lead positioning • LITFL Medical Blog • ECG Library Basics, The ECG leads: electrodes, limb leads, chest (precordial) leads, 12 …
ECG Lead positioning • LITFL Medical Blog • ECG Library Basics, The ECG leads: electrodes, limb leads, chest (precordial) leads, 12 …
Electrode Misplacement. Up to 50% of cases have the V1 and V2 electrodes in a more superior location, which can mimic an anterior MI and cause T wave inversion. Up to 33% of cases have the precordial electrodes (V1-V6) inferiorly or laterally misplaced, which can alter the amplitude and lead to a misdiagnosis. Electrode Reversal, V1 electrode is placed to the right side of the sternum, at the 4th intercostal space. Blue vertical line shows the midclavicular line. Figure 2b. Above is an example of incorrect placement of chest electrodes . V1 and V2 electrodes should not be placed on the 2nd intercostal spaces. Figure 2c.
