6 ECG, Arrhythmia, ST and QT Monitoring
Conventional 12-Lead ECG
In conventional 12-Lead ECG using 10 electrodes, an electrode is placed on the right arm, left arm,
right leg, and left leg. Six V- electrodes are placed on the chest. The right leg electrode is the reference
Place arm electrodes on the inside of each arm, between the wrist and the elbow.
Place leg electrodes inside of each calf, between the knee and the ankle.
V1 - on the 4th intercostal space at the right sternal border
V2 - on the 4th intercostal space at the left sternal border
V3 - midway between the V2 and V4 electrode positions
V4 - on the 5th intercostal space at the left midclavicular line
V5 - on the left anterior axillary line, horizontal with the V4 electrode position
V6 - on the left midaxillary line, horizontal with the V4 electrode position
V1 - V6