xeloda and cardiac incident

I just want to let members who are on Xeloda know what happened to me. This is a rare side effect but I want people to be aware so they don't discount symptoms like I did. I was on Xeloda for over a year and it was working well for me ( my cancer was stable.) Over the last 6 months or so, I would experience tightening of my chest whenever I walked either for exercise or to go to a restaurant etc.. It was usually on about my fourth day of treatment ( I was 7 days on, 7 days off.) I reported this to my doctor and was told it was severe acid reflux ( I was experiencing reflux on a regular basis.) On August 17th, my husband and I were swimming ( and by swimming, I mean a fews laps of breast stroke without even wetting my hair.) I went into cardiac arrest. My husband rescued me from the pool and I had to be shocked twice. I had a small store with no residual damage. They gave me a defibrillator. Since then, they feel that the cardiac arrest was caused by the Xeloda which can cause constriction of the arteries. That combined with the fact that I have mitral valve prolapse caused the "perfect storm" that stopped my heart. I write this, not to scare people, ( we certainly all have plenty of uncertainty already) but to make sure that if you have any of these symptoms, that your doctor checks out your heart.