Some new info on research in this area 

https://paulickreport.com/horse-care-category/fatal-cardiac-events-and-horses-whats-the-connection/

Research on how long horses body temps stay raised and when they should be stalled or trailered afterwards.

https://paulickreport.com/horse-care-category/study-equine-temperatures-remain-elevated-long-after-exercise-concludes/

I really like these horse care articles from Paulick.  Now that I have Marty I pay close attention to them.

Yes they are informative. You can also get Eqqus magazine to keep on hand. 
https://equusmagazine.com/

NY has used a sensor under saddlecloths to monitor at risk horses

https://paulickreport.com/horse-care-category/wearable-technology-helps-new-york-identify-at-risk-horses-in-prospective-study/

I hope this new technology will be utilized across the industry-- it seems to have lots of potential to pick up issues before they become life-threatening

https://paulickreport.com/horse-care-category/what-have-we-learned-from-over-1000-pet-scans-of-racehorse-fetlocks/