. Dear John,
After reading of this experience in yesterday's Doves posting,  http://www.fivedoves.com/letters/apr2011/johnc48.htm

I began to wonder , if you are able to use the supplement tablets Taurine .  I purchase it from GNC stores locally
A natural alternative / nutritionally focused MD wrote on it & recommended it for muscle tone--  my heart muscle has  been in regular heart rhythm while I use it.   I do generally take at least 2 tablets a day, and originally used 4 daily to load & worked to achieve results. You might already know of it - just thought of how  valuable it has been for me & needed to write. YSIC,  Lynnette