Good reminder that it is the electrolytes in our bodies that are responsible for our heart contractions and rhythm. I have seen patients develop atrial fibrillation from being on hydrochlorothiazide for too long without a proper diet.
Also try centering your pictures. all you have to do is surround the full picture link with (center)picture link(/center) but use <> instead of ().
RE: How can our heart keep beating on it's own, over and over till we die - Understanding Electrical Activity of the Heart