Further validation for the Everion’s Heart Rate Variability parameter

New research released this month has confirmed what our customers already know: Biovotion’s Everion provides medical-grade data accuracy, especially under motion such as running or biking. The latest study out of ETH Zürich comparing ‘off the shelf’ wearables (e.g. the Empatica E4, Fitbit Charge HR, and Polar OH1 armband) to the gold standard Holter ECG monitor, found that the Everion demonstrated “excellent reliability with regards to the Holter in all the activities” and that “armband-devices are less susceptible to artifacts due to movement” than wristband monitors. These findings once again confirm our philosophy of placement on the upper arm to achieve outstanding measurement quality.

In fact, the Everion performed as well as the Holter during intense activity, whereas the watch-style Empatica E4 showed a large amount of bias and noise, particularly during biking tests. The researchers conclude that the Empatica is therefore “not suitable for monitoring HR during strenuous activity”. These results open exciting avenues for patient monitoring with the Everion, allowing investigators to collect medical-grade data not only in new environments but also in new situations, such as day-to-day activity including motion.

While the Holter uses a traditional ECG (Electrocardiography) sensor, the Everion utilizes the PPG, or photoplethsysmography to generate readings. Although there has been some debate around the merits of each sensor type, this research adds to the growing body of evidence that shows PPG to be not only just as accurate as ECG, but also much easier to wear. In fact, this study has found the Everion’s datasets to be “comparable and showing excellent agreement with respect to the Holter” across the entire range of tested activities. This indicates that PPG is a strong alternative to ECG, particularly when long-term data collection is required. Unlike the Holter, the Everion is easily put on at home, can be removed for showering and swimming, and does not have cables or electrodes which are susceptible to movement.

As anyone in the medical or clinical trials field knows, comfort and ease are critical for patient compliance. Now, no one must choose between comfort and quality. The Everion offers continuous medical-grade vital signs monitoring, so practitioners have an overview of health which spans weeks or months, rather than the snapshot provided by in-clinic monitoring. We’re thrilled to see independent research validating our parameters – and look forward to further collaborations in this direction.

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