This seems to be surfacing all over.
Personally, I think this is a load of nonsense.
This would not only negate what we know about the autonomic nervous system but it's not even supported with sources. It's posted on nearly every spiritual blog I could find but not a single respected scientific website. Thus, I believe it is hardly such. It even makes the giant leap in the article from a greater electromagnetic field to suggesting a telepathic "oneness". Come on, where are our filters?!
The sinoatrial node-located in the right atrium of your heart, the atrioventricular node-located on the atrial septum, and the HIS-Purkinje system-located along the walls of the heart are the electrical components of the heart. None of which is associated with higher CNS involvement. It runs on automation, in other words, you can't "think it" to stop. It keeps going and it's going really fast, why shouldn't it have a greater electromagnetic field? To me, all that means is that the brain utilizes it's energy better. Lots of weak signals in the brain, compared to a few strong signals in the heart.
The starter in your car probably generates more of a field than your laptop, so, does, that mean it's more significant? Does that prove your car has a greater connection to the other cars?
How any of that has made a leap into the spiritual drivel of theist society is simply because someone started wielding sciency things in the faces of a bunch of non-sciency people.