Signal-Averaged ECG

What is a Signal-Averaged Electrocardiogram (SAECG)?

• A SAECG is a non-invasive test that records the electrical activity of the heart.
• It is similar to a regular electrocardiogram (EKG) but uses computer processing to record lower-level signals that do not normally appear on a standard EKG.

Why is a SAECG Done?

·Helps to predict the likelihood of high-risk patients developing life-threatening ventricular arrhythmias

What Preparation is Needed?

• This test must be ordered by a doctor.
• No restrictions on food, liquid or medications prior to the test.
• Do not apply lotions, oils, or powder to the chest area.

How is the test done?

• Electrodes are placed on the chest. The electrodes are attached as follows:
• RA – just below the left clavicle on the midline
• RL – right pelvis
• LL – left pelvis
• A1 – H – on the back of the neck
• A2 – E – mid sternum
• A3 – I – V6 right
• A4 – M – center of the back
• The test takes approximately 10 to 30 minutes.