Hi, this may be a strange question, i am trying to understand what happened with a recent situation involving a family member, the person had no symptoms befor ethe incident, she started to fit, slight foaming at the mouth and long deep, slow breaths, 4 breaths before they stopped, i commenced cpr however this failed as the person died, basically im just trying to figure out what caused the fitting, as nobody at the hospital could tell me y and the post mortem came back as ischaemic heart disease due to her long standing history,but was there another factor that could have been overlooked?