I have had a problem for years that gave me chest ache which at time was severe. I was sent to a hospital in london where they put a camera int a vein or artery in my leg. iwas able to the operation of my heart (within limits) on an overhead screen. they said I had nothing wrong and had syndrome X. aches with no medical origin and also said a feww people get this. I have recently discovered that the repeating leg muscle cramps I have also been suffering is cured by taking more salt . is this the connection?