Atrial Fibrillation (AFib) Support Group
Atrial fibrillation (AF or afib) is an abnormal heart rhythm (cardiac arrhythmia) which involves the two small, upper heart chambers (the atria). Heart beats in a normal heart begin after electricity generated in the atria by the sinoatrial node spread through the heart and cause contraction of the heart muscle and pumping of blood.
http://voices.yahoo.com/lip-keeps-twitching-causes-solutions-scared-5556297.html
If you start hopping around and craving carrots, I think I might have the answer. Sorry Ray, couldn't resist. Read the article. It's probably nothing.
petey