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    3 weeks, 2 days ago

    Anyone know what the square symbol with a zero inside means on the ECG?

    1 Comment
    • I believe you are refering to the “Other reading” markers. Click the info button in the “Workout Details” window on the upper right, a pop-up window will show you the definitions for the data feilds. (Make sure to allow POP-UPS in your browser for the website.)