"Thanks Oramar" for the info. Interesting to me as my daughter had complex congenital heart disease. More interesting is that her 4 yr old son has always got some sort of cold, asthma, cough always seems sick. Now he has what I would describe as a sick sinus syndrome. Peds Cardio is putting on a holter and evaluating. Also of interest is that he is about 10 lbs underweight, never hungry and easily fatigued, much like my daughter was. Before she had him, the docs told her it would be 1 chance in a million she would have a child with heart defects. Maybe he was that 1 chance?