I get pressure to my head if im too hot, dizzy, or carrying something heavy. Its not fun. XD um. In stores and restaurant when the air pressure changes i can get really faint feeling and lose my hearing for a minute and get a little dizzy. Ive never passed out however. I dont think ive ever had an mri done. What does an mrv do compared to a mri? Ill do this testing after the holter monitor test. The bad thing about free health care is that it takes forever to actually get the tests done. My doctor booked the holter monitor back in september and its in use till February.