My boyfriend, age 69, the top of his head gets real hot, then, he blacks out, hits the floor. This has happened a few times with dizziness added to the hot feeling in the head. VA doctor said Vertigo. He is in hospital now. It happened again today, without dizziness. Just felt hot, blacked out, hit the floor, broke ankle, gash in head requiring staples. CAT scan shows nothing unusual in the brain. What can this be? Would a PET scan be better? He is on numerous meds from the VA.