Wathcman Heart Implant to Reduce Non-Valvular Afib Stroke Risk by 1/5

Their infomercial on Youtube, not limited by airtime, is quite informative about a few different causes of brain strokes.

https://www.youtube.com/watch?v=x6Rt_HU1nD8

https://www.cdc.gov/stroke/types_of_stroke.htm

"Wathcman" -> "Watchman"