What happens if you fall upside down?
What happens if you fall upside down? Impact on Heart Medical professionals think heart failure is the cause of death in most upside-down fatalities, for much the same reason our brains can suffer: When you're head down, your heart slows down its pumping and starts receiving more blood than it has the capacity to manage at one time.
What would happen if you fell asleep upside down?
It is not safe to sleep upside down. Remaining upside down for a prolonged period could increase a person's risk of high blood pressure and a buildup of pressure in the skull and behind the eyes. These could lead to severe complications or even be fatal.