A November market research report pegs the global wearable medical devices market to reach $16.8 billion by 2022. That is up from $3.5 billion in 2014. 

Not surprisingly, the Diagnostics & Monitoring segment of the overall wearables market commanded the largest market revenue accounting for more than 70% of the market share in 2014, according to the report.

Some examples of monitoring wearables are the Seeq device from Medtronic that monitors the heart for 30 days. Another the Zio-XT patch from iRhythm Technologies continuously collects data for two weeks to help doctors determine whether patient has atrial fibrillation. The Zio-XT patch is meant to be an alternative to the cumbersome Holter monitor that patients typically wear for a couple of days

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