Patient information

Designed with you in mind


Why has my doctor registered me with Zio XT?

Proven to detect irregular heart rhythms quickly and accurately


Zio is a cardiac monitoring service that is proven to detect irregular heart rhythms quickly and accurately. Because Zio is so discreet and comfortable, you can continue with your daily activities, even showering and exercising, assured that Zio is capturing every heartbeat.

What is arrhythmia?

Your heart might beat too slow, too fast, or with an irregular beat. It may feel like skipped beats or a brief pause. It might be so slight that you don’t even feel it or experience any symptoms. You may have an irregular heartbeat or an arrhythmia. Fortunately, there are treatments available for arrhythmias. However before you can begin treatment, the condition must be diagnosed.

A simple, one-time test with the Zio by iRhythm system could be all you need to find out whether or not you have an arrhythmia and what kind you have. Your doctor can then use this data to prescribe the most effective form of treatment.

What is an ECG?


An electrocardiogram — abbreviated as ECG — is a test that measures the electrical activity of the heartbeat. With each beat, an electrical impulse (or “wave”) travels through the heart. This wave causes the muscle to squeeze and pump blood from the heart. A normal heartbeat on ECG will show the timing of the top and lower chambers. For more information please visit the NHS website.

What is ambulatory cardiac monitoring?


An ambulatory ECG records the electrical activity of your heart while you are doing your normal everyday activities.

“Ambulatory” means that you are able to stand and walk, and are not stationary or motionless. Many heart problems are only detectable during activity such as standing or walking and will not appear in a brief test in your doctor’s office.

1Turakhia, M., et al. (2013). Diagnostic Utility of a Novel Leadless Arrhythmia Monitoring Device. The American Journal of Cardiology.

Our solution

Continuous, uninterrupted monitoring

Zio XT Patient-friendly Monitor

The Zio service was designed specifically to facilitate high patient compliance and allow data to be recorded uninterrupted and continuously for up to 14 days.

No gaps in data due to patient-centric design

Convenient button to mark episodes

Patients can continue daily activities while wearing the Zio monitor, including showering and exercising.

A simple path to a clear diagnosis



After the comfortable, easy-to-wear Zio monitor is applied, the Zio patch records and stores every single heartbeat.



These recordings are analysed by a powerful Zio system that identifies any irregular rhythms you’ve experienced—how many, what type, and when. In a study, physicians were able to reach a diagnosis of 90% of the time with the Zio system2.


A definitive diagnosis to accelerate your care

Your doctor receives a clear report that shows how many and what types of irregular heart rhythms you experienced, as well as your normal heart rhythm, and when they happened — all to help determine the best course of treatment.

2Barrett, P., et al. (2014). Comparison of 24 Hour Holter Monitoring Versus 14 Day Novel Adhesive Patch Electrocardiographic Monitoring. American Journal of Medicine.

More about the Zio service


Live without restrictions


The Zio ambulatory cardiac monitor is a small, unobtrusive, and water-resistant patch—you might even forget you’re wearing it. The Zio monitor records and stores every beat of your heart, whether you’re sleeping, working out, or showering.

Zio vs. Holter monitoring


The Zio monitor can be comfortably worn for up to 14 days. Holter monitors can be worn for 24 to 48 hours, limiting the time to record any irregular heart rhythms you may have. Zio is able to capture data for the 51% of patients who have their first symptom-triggered arrhythmia after 48 hours.

1Turakhia, M., et al. (2013). Diagnostic Utility of a Novel Leadless Arrhythmia Monitoring Device. The American Journal of Cardiology.

Frequently asked questions

Have questions about Zio XT?


For the first 24 hours post application, please avoid getting the Zio monitor wet or sweating excessively, i.e. during exercise. After that, carry on with regular activities. You can shower and exercise after the first 24 hours. Wear the Zio monitor for the length of time advised by your physician, but no longer than 14 days. The Zio monitor is recording and storing every heartbeat while you are wearing it. Your physician uses this data, analysed by iRhythm, to determine the right course of action for you. While working properly, the monitor will not flash or make any sound. If you have any questions, please call iRhythm Customer Services Team on 0808 189 3411.

Get in touch

Where can I get the Zio service?

The Zio system is available in both the private sector and the NHS. Please fill out the short form and a representative will follow up with you to appeal a convenient location.