College of Veterinary Medicine

WSU Veterinary Holter Service

WSU Veterinary Holter Service

1. Cut or tear 10 pieces of white tape approximately 2 inches long.
2. Snap the colored ends of the patient cable to the electrodes.
3: Shave 5 spots approximately 2 inches by 1.5 inches. Start by shaving a spot directly in between the shoulder blades, and then make two more spots down each side of the dog. Each spot should be an inch to two inches away from each other with the last spot being directly caudal (towards the tail) to the elbow of the dog. Make sure that each spot is well shaved by shaving against the hair. Try to keep the spots symmetrical on either side of the dog.
4. Prepare the monitor:

a. With the monitor face down, cable connection towards you and the words Trillium 5000 at the top, the left side of the monitor is where the memory card has been inserted for you. You will not need to access this compartment.


b. The right side door is for the battery. Open the battery compartment and insert an AA battery, observing the polarity diagram in the compartment. Securely close the battery compartment.

5. Remove the white electrode from the backing and stick between the shoulder blades. If you are using electrode gel or paste, a small dab of gel should be placed on the sticky gel center of each electrode before applying. Take two pieces of white tape torn earlier and place over the sides of the electrode. Do not cover the colored part, just the back of the sticky electrode.
6. Proceed to the next shaved patch down the left side of the dog. Attach the red colored electrode to this spot and place two pieces of white tape to either side of the electrode.

7. Continue down the left side of the dog. The next electrode to be placed in the same manner as before is the brown one.
8. Go to the right side of the dog. The colors on this side go green then black, with green being placed on the highest patch and the black being placed on the lowest patch. The green electrode is the ground. It is very important for this lead to be attached well to the dog's skin to get a good reading.
 9. The lead wires should then lay forward on the dog so they are sticking out towards the neck while the Elastikon is taped on, instead of towards the tail. Place a strip of Elastikon over all the electrodes and the white tape. Start on the right side of the dog and stick it approximately an inch below the brown electrode. Hold the end against the dog's body while unrolling the Elastikon and continue to stick it to the dog while unrolling it over the dog's back. Wrap the Elastikon all the way around the dog by going under the dog's chest.
 Note: Do not pull too tightly as Elastikon stretches and you could make it too tight around your dog. Lay the tape loosely onto the dog, do not pull or tug it tightly.

10. Now it is time to put the vest on. For an orange vest: Place the vest on the floor with the pockets down. Place your dog's feet into the holes and lift the vest up on either side of the dog. The zipper should be on the back. The leads should be forward, along the neck, not sticking out the back.

For a black vest: open the Velcro along the top, insert the dog's legs into the bottom holes and re-fasten the Velcro along the dog's back. You will need to unclick the monitor from the cables so you can feed the cable through the hole on the top and then re-attach the monitor. It does not click together easily so please use care not to break it.
11. Turn on the monitor by pushing any keypad button. The first screen will ask you to input a patient ID number. Ignore this screen and scroll to the right using the   button. You should be able to see the ECG tracing on CH1, push the  button again to see CH2, again past CH3 and the SETTINGS menu until you get to the DATE/TIME menu. If the date and time are incorrect, press the  button. Use the up and down arrows to move to the item that needs to be corrected. Use the left and right arrow key to change the time or date. Press the key again to accept the changes.
12. Start the holter recording by using the right arrow key to move over to the START menu, then press the key to start the recording.
13. Place the monitor into it's protective pouch and then place it in one of the pockets on the back of the dog. Try not to “kink” the patient cord as this too can add artifact to the reading.

14. For the orange vest, cut a piece of Elastikon to cover the exposed patient cable. This will help protect the patient cable from being chewed by your dog. (Or any other dogs that will be in contact with your dog during the 24 hours.
15. For the black vest, only pull through enough cable to attach it to the monitor, the rest should stay safely tucked into the vest. Tuck the monitor into the pocket and stick it the the side of your dog (it is Velcro too) and then wrap the Velcro belt around it as well to secure it in place.

Remember: These monitors were designed for human use so it is important to secure everything that can open, move, or disconnect. This will allow your dog to perform normal daily activities without the likelihood of disturbances in the reading.
The monitor needs to remain running for at least 24 hours. While wearing the monitor we encourage you to let your dog participate in normal daily activity. The only things your dog cannot do is go swimming, get a bath, or stay out in the rain/snow for prolonged periods.

To remove the monitor

Remove the monitor from the pocket, and if using an orange vest, pull the tape off that is securing the patient cable. If using a black vest, you will need to unclick the cable from the monitor again to pull it through the hole in the vest. Remove the vest and carefully remove the Elastikon. (This can be somewhat painful. It is like a giant Band-Aid coming off. There are sprays that you can purchase to alleviate this process if your dog is really sensitive.) DO NOT USE SCISSORS to cut the Elastikon, peel it down from the top with the fur – not up/against the fur. Or front to back with the grain instead of up or forwards.


If the patient ECG patches did not come off with the Elastikon, carefully remove them from the patient. Discard any tape, Elastikon and the ECG patches.

You do not need to remove the flash card from the monitor, please leave it in place. Please remove and discard the battery.

When returning the monitor, place the monitor and patient cable in the pockets of vest and wrap the vest around the monitor for padding. Please return any unused supplies. By returning the supplies you keep the cost of the service down for everyone.

Thank You
Last Edited: Apr 09, 2013 2:51 PM   

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