I first discovered HeartMath, Doc Childre, etc. almost 10 years ago. The idea of heARTmatters had just "dawned" on me and I was drawn to anything/ everything I could get my hands on that seemed to have any relevance to matters of the heART.
Synchronistically enough, I just came upon a link to their site. The extent of their research has multiplied exponentially ... Here's a small sampling.