There's a different doctor that is using turbines to continually move blood. They have special bearings that prevent shredding and clots. Interesting note: a patient with this system will have no detectable pulse!

https://www.popsci.com/science/article/2012-02/no-pulse-how-...

Also, it seems that this doctor was pushing the turbine heart system on patients that didn't actually need it in order to further research.

https://www.houstonchronicle.com/news/investigations/article...