My mom fainted Wednesday and Saturday. Both times she was admitted for one night. They did MRI, MRA, EEG, checked her carotid arteries in her neck and EKG and wore a heart monitor. ALL tests showed no issues. They did find her sodium was 130 with 135 being normal and said she was dehydrated. Today, Monday, she didn't like the caregiver and was upset and had a headache I gave her daily morning meds and sent the caregiver home. I asked her to lay down. My dad has slight dementia. At 12:30 we decided to wake her she would not wake up. Went to ER. Cap scan, blood work and urinalysis. Nothing.. ER dr told me this was dementia causing this. Next time I should just keep her at home. I'm wondering if there is any test that would show anything else. Or should I just take the ER dr's advice.