Patient Prep

Philips Holter with Zymed Algorithm

Patient Prep

Mid-axillary leads should be placed on the sides of the patient, not in an anterior location.
Note: Accurate placement and care in proper hookup techniques areabsolutely critical for Holter leads.

E (Brown)
Level of 5th intercostal space, midsternum
A (Black)
Same level as E and I, left mid-axillary line
S (Red)
Top of sternum, manubrium
I (White)
Same level as E and A, right mid-axillary line
Ground (Green)
Center of sternum or any convenient location
Raw Channel
Channel 1
E (+) to S (-)
Similar to MC V1, anterior view of the heart
Channel 2
A (+) to S (-)
Similar to MC V6, a lateral view of the heart — useful for ST
Channel 3
A (+) to I (-)
CC6, similar to the inferior lead aVF – approximation suitable
for ST measurements

Preparing the Patient

Before You Begin

  • Insert a fresh AAA battery into the Digitrak XT(AA battery for the Digitrak Plus) with each patient.
  • Be sure to observe the correct battery polarity.
  • Instruct the patient not to tamper with the recorder, remove the battery, or disconnect the patient cable.

To Prepare the Patient

Prepare the patient’s skin prior to applying the electrodes. Skin is a poor conductor of electricity, so skin preparation is important in achieving good electrode-to-skin contact.

  • If necessary, clip hair at the electrode sites (or shave sites, if needed).
  • Clean and abrade the skin at the electrode site. Wash skin thoroughly with soap and water.
  • Dry the electrode sites briskly to increase capillary blood flow in the tissues and to remove oil and skin cells.
Attach the leads to the electrodes before placing them on the patient.
Apply the electrodes by peeling them, one at a time, from the protective backing and sticking them firmly to the patient’s skin. (Refer to Figure 1-1 for proper electrode placement.) Press around the entire edge of each electrode to ensure they are secure. Make sure the lead wires do not pull on the electrodes.