Introducing the C3⁺ Holter Monitor


Record three channels sampled at 256Hz without any wires. The device can store recordings of up to 25 days and has a battery capacity of up to 7 days.


Analyse your data using Artificial Intelligence. Generate automated reports using Cardiomatics to support diagnostic decisions.

Medical certification

The C3⁺ is a certified class IIa medical device. Click here to review the technical and regulatory information.

Leightweight & effortless

The 32 gramm device is made to fit both female and male anatomies. It's as small as 85 x 80 x 15 mm. Start recordings with a single button press.

Detailed look at the ECG signal

Preview ECG data with your iOS or Android device. The Cortrium C3⁺ app enables a detailed look at your heart rate, while the device is monitoring it.

Flexible pricing

Next to a full purchase, we offer a subscription model.

"The C3⁺ allows a faster and more efficient way of monitoring patients."

Cardiologist XYZ, DE

"The C3⁺ is easy to attach, connect and all in all a helpful tool with great potential."

“The C3⁺ is comfortable to wear compared to other Holter Monitors.”

Intelligent analysis

Using Artificial Intelligence, C3⁺ recordings can be analysed using Cardiomatics. The reports can support diagnostics decisions and are clinically validated with a sensitivity of 93% for the detection of Atrial Fibrillation.

Download Sample Report

Easy set-up

We’ll set you up in no time!

The C3⁺ Holter Monitor does not require an extensive installation with your IT system. We use an intuitive Data Transfer Tool.

We offer an extensive technical support for existing customers.

If you have any general questions, please don’t hesitate to contact us.

Contact UsTechnical Support

Developed & produced in Denmark

Since 2014, we collaborate with international researchers and healthcare professionals and work with them on the exciting edge between technology and healthcare.

After years of research and development, the Holter Monitors C3 and its successor, the C3⁺ (released in September 2019), have been approved as a class IIa medical device and are since then in use by physicians, hospitals and healthcare professionals all around Europe.

About Us

Using the C3 Holter Monitors, doctors were already able to detect more than 4.300 atrial fibrillations.

Sensitivity of detecting ventricular beats based on MIT-BIH database.
Sensitivity of detecting episodes of atrial fibrillation, based on MIT-BIH database.

Sensitivity statistics sourced from

Get started. Today.

Contact us to try the C3⁺

Qualified physicians can apply for a trial phase!
We will put you in touch with our local distributors.