Holter Monitor

Holter Monitor

The 24-hour Holter monitor is a non-invasive test and is generally well-tolerated by dogs. It provides valuable information that aids in the diagnosis, screening, and monitoring of heart conditions, ultimately helping to improve the health and quality of life for dogs with heart rhythm disturbances.


The Holter monitor is an important diagnostic tool used in veterinary medicine to evaluate cases where intermittent disturbances in heart rhythm are suspected. It is also used for screening certain breeds of dogs, such as Dobermans and Boxers, for irregular heartbeats associated with hereditary cardiomyopathy (heart muscle disease).


Additionally, the Holter monitor is used to monitor the effectiveness of medications used to treat irregular heart rhythms.

Holter monitors are typically worn for 24 hours, but can be worn for several days, as needed to obtain the information needed for evaluation.


Here’s how the 24-hour Holter monitor works:


  1. The Holter monitor is a small device that records the electrical activity of the heart continuously over a 24-hour period.
  2. Electrode stickers are placed on both sides of the dog’s chest and connected to the monitor, which is typically worn like a backpack or vest.
  3. The electrodes detect the electrical signals produced by the heart as it beats.
  4. The monitor records the ECG data throughout the day, capturing any abnormalities or irregularities in the heart rhythm.
  5. Your pet may continue their normal activity such as walking, playing, and rolling around while wearing the monitor with the exception of swimming or playing in the sprinklers. The monitor must stay dry.


The 24-hour Holter monitor allows us to gather valuable information about the dog’s heart rhythm over an extended period of time. It helps identify intermittent disturbances in the heart rhythm that may be associated with fainting, weakness, or even sudden death. This information is crucial for accurate diagnosis and determination of the appropriate treatment plan.


In certain breeds of dogs that are prone to cardiomyopathy, the Holter monitor can be used as a screening tool to detect irregular heartbeats before clinical signs appear. Early detection allows for timely intervention and management of their heart condition.


The Holter monitor is also used to assess the effectiveness of medications that were prescribed to treat irregular heart rhythms. By analyzing the recorded ECG data, we can determine how well the medications are controlling the abnormal heart rhythms and make necessary adjustments to the treatment plan.