I have been living with sudden drops in my blood pressure that causes me to pass out, for the past two years. My blood pressure is normally high and I am on medication. I have falls too numerable to count. Doctors have run every known test and cannot find the cause. I have had heart catherization, table tilt test, 3 day EEG studies, holter monitor test, ecocardigram, MMR's, MRA's , doppler , you get the picture. The only thing that they found was a blockage in one of my carotid arteries. I had surgery last week to correct this, thinking that this would be the answer, but just this week I have the same problem. I have fainted and had three more bad falls since the surgery. Can anyone help me? I am Desprate.