ECG has 10 electrodes and produces 12 ECG leads reading. How is happen from 10 electrodes to 12 leads?einthoven triangle

Bipolar electrodes

RA - right arm

LA - left arm

LL - Left leg

RL - Right Leg

Unipolar Electrodes

V1 V2 V3 V V5 V6

while 12 leads happen from 10 electrodes configurations

Lead I = Right arm - Left arm

Lead II = Right arm - Left Leg

Lead III = Left arm - Left Leg

Lead aVr = Left arm and Left leg - Right arm

Lead aVl = Left leg and Right arm - Left arm

Lead aVf = Left arm and Right arm - Left leg

Lead V1, V2, V3, V4, V5 and V6

12 Lead ECG Placement

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