NEW : Relationship between Travolta and son Jett was loving , affectionate . NEW : He said chemicals in cleaning products caused son 's rare disease . Jett Travolta was elder child of John Travolta and Kelly Preston . In the worst-case scenario , sometimes it can affect the blood vessels of the heart , called the coronary arteries , '' Gupta said . Jett Travolta lived in Nassau , Bahamas , where family was well - served by community .
NEW : Relationship between Travolta and son Jett was loving , affectionate . NEW : He said chemicals in cleaning products caused son 's rare disease . Jett Travolta was elder child of John Travolta and Kelly Preston . Jett Travolta lived in Nassau , Bahamas , where family was well - served by community .