What is a Holter monitor?
A Holter monitor is a portable device used to continuously monitor the electrical activity of the heart. Its extended recording period is useful for observing occasional or intermittent cardiac arrhythmias that may be difficult or impossible to identify during a routine clinical examination.
What does a Holter monitor do?
The monitor is usually worn for at least 24 hours during normal activity. You should keep a diary of what activities your cat does while wearing the monitor, such as playing, eating, or sleeping. There is a button on the monitor for you to press to mark an observed event such as an episode of weakness. After the recommended time, you will return the monitor and diary to your veterinarian's office. Your veterinarian will analyze the recorded ECG, looking for abnormalities. Alternatively, your veterinarian may submit the recording to a cardiology telemedicine service for analysis.
Why does my cat need to wear a Holter monitor?
A Holter monitor is typically used for patients with a history of syncope (fainting) or if your veterinarian detected abnormal or irregular heartbeats during a clinical examination of your cat. Some of the uses include:
- determine heart rate variability during normal activity, exercise, rest, or sleep
- diagnose the type of arrhythmia (abnormal or irregular heartbeat or rhythm) to determine the correct treatment
- analyze the effectiveness of prescribed cardiac drugs
- evaluate pacemaker function
How does my cat wear a Holter monitor?
The Holter monitor used for cats consists of a special vest, which contains the monitor, attached to several ECG lead wires. It is unobtrusive and most cats ignore its presence very quickly. Your cat will likely have several areas of fur shaved to attach the ECG leads to the skin.
If your cat requires a Holter monitor, your veterinarian will give you specific instructions on its use. This relatively simple but highly effective device has saved countless human and animal lives since it was first introduced almost 70 years ago.
