''Her sudden and tragic passing is currently being investigated as a homicide related to a medical procedure that took a turn for the worse,'' the family claimed. ''It is with deep sorrow and an immensely heavy broken heart that we have to share the most shattering, unfortunate, and unexpected passing of our beautiful beloved daughter and sister Christina Ashten Gourkani,” Ms Ashten's family.Cardiac arrest occurs when there is an abrupt loss of heart function, caused by a problem with the heart's electrical system, as per the Mayo Clinic. The 34-year-old model, based in California, enjoyed a fan following of over 6,26,000 on Instagram.