hi, my mother passed away recently, the cause of death stated was sudden cardiac arrest. But I just wanted to know that happend, i spoke to her 30 mins before she passed away, she was completely fine, then i found her dead on the couch. her lips were blackish, and there was mucus from her nose, she was suffering from cold for a few days but she was alrite that day. She was just 43 years old, and she had high blood pressure.