https://cyclingtips.com/2018/11/219-beats-per-minute-the-day-my-heart-short-circuited
https://trailrunnermag.com/training/injuries-and-treatment/heart-stopping.html
Mike Lenick
https://www.bch.org/Latest-News/2019/April/Lecture-Audience-Sees-Life-Saving-Skills-in-Acti.aspx