Continuous ST segment monitoring

Associate Editors-In-Chief:

Limb electrodes are placed on the torso to reduce muscle artifact during limb movement and to avoid tethering the patient in bedside cardiac monitoring.

The right arm (RA) electrode is placed in the infraclavicular fossa close to the right shoulder, the left arm (LA) electrode is placed in the infraclavicular fossa close to the left shoulder, and the left leg (LL) electrode is placed below the rib cage on the left side of the abdomen. The ground or reference electrode (RL) can be placed anywhere, but it is usually placed on the right side of the abdomen.

Lead placements for monitoring systems as follow: