They are close but have have either not yet learned that what they are measuring is the being and its vibration and other qualities, not the heart muscle, or are deliberately making the message more acceptable by slightly altering the source from the spiritual to the physical.
You are a spiritual being with the potential to know everything, past, present and future.
Some experience moments of increased awareness.
Some have abilities others do not choose yet to manifest.
The core message is sound – that you as a being have a vibration that can be sensed and measured by others. By eschewing those individuals who and those activities and thoughts that lower our vibration rate and associating more with those people at or above our own vibration rate and engaging in activities and thoughts that raise our vibration we raise our survival potential and that of those around us.
http://thespiritscience.net/2015/07/02/the-hearts-intuitive-intelligence-scientific-proof-of-intuition/
Toms Blog on Life and Livingness