Hi RLR,

I have a quick question regarding Ectopic Focus.  Now I understand ectopic focus focus is an excitable group of cells that causes a premature heart beat outside the normally functioning SA node of the human heart.  It is caused by Increased local parasympathetic nervous system activity, and also Elevated sympathetic nervous system output.  Now is this still benign vagus nerve activity?  Please explain whan causes ectopic foci and there benign nature.  
  I recently had a holtor monitor which revealed that I get Pac's when my heartrate is high, and then pvc's when my heartrate is coming down.  Could my anxiety and adrenaline have cause my hearts cells to become irritable?  Ectopic focus ectopics originate inside the heart, but you always refer to outside the heart.  Thank you