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2. We Tested All the Smart Rings. Here Are the 6 Best for ... - AOL

   www.aol.com/tested-smart-rings-6-best-152600082.html

   O2ring Wearable Pulse Oximeter. Another wallet-friendly smart ring option, this device from Wellue features a generous screen on top to read your heart rate, blood oxygen level, and time.

3. Circul+ packs an ECG sensor into its heart-tracking ring - AOL

   www.aol.com/news/circul-plus-ecg-ring-100035276.html

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4. The 4 Best Smart Rings That Will Track Your Health and Look ...

   www.aol.com/4-best-smart-rings-track-153300325.html

   Monitor your sleep, count your steps, and track your overall fitness with a smart ring. These are the best options from brands like Oura, Circular, and Samsung. ... and 24/7 heart rate monitoring ...

5. Oura Health - Wikipedia

   en.wikipedia.org/wiki/Oura_Health

   Oura Health Ltd (natively Oura Health Oy) [1] [2] is a Finnish health technology company, known for the Oura Ring (stylized Ōura), a smart ring used to track sleep and physical activity. The company was founded in 2013 by Petteri Lahtela, Kari Kivelä, and Markku Koskela.

6. Cardiac contractility modulation - Wikipedia

   en.wikipedia.org/wiki/Cardiac_contractility...

   The FDA approved the OPTIMIZER Smart System, which delivers cardiac contractility modulation therapy, as indicated to improve 6-minute hall walk distance, quality of life, and functional status of NYHA Class III heart failure patients who remain symptomatic despite guideline directed medical therapy, who are in normal sinus rhythm, are not indicated for cardiac resynchronization therapy, and ...

7. Smart ring - Wikipedia

   en.wikipedia.org/wiki/Smart_ring

   Secure access control such as for company entry and exit, home access, cars, and electronic devices was the first use of smart rings. Smart rings change the status quo for secure access control by increasing ease of use, decreasing physical security flaws such as by ease of losing the device, and by adding two-factor authentication mechanisms including biometrics and key code entry.