Your doctor is referring to the bathmotropic effect, which increases a cell's responsiveness to factors that it otherwise responds to at a more basal response rate. In other words, the increase of calcium ions produces a bathmotropic effect upon the myocardial cells.

It is sometimes possible for foci to develop within the heart that respond under certain bathmotropic influence, but these foci are permanent within the heart's architecture and they do not constitute the source of benign palpitation events experienced by members and guests visiting this forum.

I've taken note of a pattern in your responses that constitute the growing approximation, but not accuracy, in the interpretation of what is considered to be the more complex areas of physiology. You appear to be heavily immersed into a realm of human science and physiology that can be quite foreboding in the absence of the prerequisite academic exposure in such a study.

While I am certainly pleased that you take greater than normal strides in seeking out relevant information on the topic, it is neither the nature nor purpose of this forum to strive for levels of dialogue that pertain more to the architecture and mechanics of human physiology than to quell the irrational fears and concerns of persons experiencing palpitations.

I take this opportunity to mention my observations because my time of late is extremely limited and I've already become quite tardy in making the more traditional responses to persons seeking inquiry. At my age, I'm simply not able to stir the same levels of endurance that were once possible in my youth and I would therefore ask that while posting of such topics is certainly welcome on the forum, I'll say in the same breath that my ability to purview and respond to this particular line of dialogue will unavoidably become far secondary to the more primary goal associated with the forum.

Thank you once again for taking such a keen interest in these matters and I trust that my responses have brought you closer to the understanding you seek.

Best regards,

Rutheford Rane, MD (ret.)