ECG, Arrhythmia, ST and QT
The electrocardiogram (ECG) measures the electrical activity of the heart and displays it on the
monitor as a waveform and a numeric. This section also tells you about arrhythmia monitoring (see
page 105), ST monitoring (see page 117) and QT monitoring (see page 127).
Skin Preparation for Electrode Placement
Good electrode-to-skin contact is important for a good ECG signal, as the skin is a poor conductor of
Select sites with intact skin, without impairment of any kind.
Clip or shave hair from sites as necessary.
Wash sites thoroughly with soap and water, leaving no soap residue.
We do not recommend using ether or pure alcohol, because this dries the skin and increases the
Dry skin thoroughly.
Gently abrade the skin using ECG skin preparation paper to remove dead skin cells to improve the
conductivity of the electrode site.
Connecting ECG Cables
Attach the clips or snaps to the electrodes before placing them. If you are not using pre-gelled
electrodes, apply electrode gel to the electrodes before placement.
Place the electrodes on the patient according to the lead placement you have chosen.