Princess Bajrakitiyabha had problem with arrhythmia since her high school if not even earlier - since age 13 from what I can recall her mom telling me

 It got very bad one time when in university probably in 1998...mom told me further upon father Maha's request they found her to suffer from arrhythmia first at age 11,12...mom had physician to examine her through at age 13 - medical records. 

@Bajrakitiyabha - now you know too. Your mom told me this in 1996 if not 1995. And what a beautiful name you have.