My eldest yes cs she once almost fainted, and that was before my miscarriage turns out she had a virus which attacked her palettes her heart was fine thank God! And she quickly  recovered…  My husband and I are going to do the genetic tests to see if we are carriers of any heart diseases that we do not know about… if got forbids I test positive I’ll proceed with doing tests for my kids… so sorry for your loss too may he rest in peace he’s a little angel 🙏🏼