Hello, my mom had some type of episode in which she fainted and stopped breathing . Her PCP has done CT scan with and without contrast, CBC bloodwork, urinalysis & carotoid doppler. All the tests have come back normal. She quite smoking 2yrs ago. She does have COPD , Emphysema and she snores really bad. Can you give me any possibilities of what could have caused her episode? Oh, she is 70 years old.