In cases of sudden death of this age, most often physicians feel they are due to a sudden heart rhythm disturbance which can lead to a rhythm called ventricular tachycardia. Sometimes, v-tach will cause a seizure because the brain is instantly deprived of oxygen. In such cases, the siblings of such youngsters are examined by cardiologists to help to ensure that they too do not have a cardiac conduction issue that may predispose to sudden death.
It has been one and a half years now since Grace's sudden departure. I pray for her parents, Charlie and Katie Heitzig,her older sister Ellie, her many relatives, and her friends.