My husband suddenly began having severe attacks, in which his blood pressure drops to as low as 50/40. He is 52 and has always been extremely healthy and in great physical shape. He has been hospitalized twice and tested extensively during these stays. EKG, EEG, CT, and MRI results were all normal, as were all cardiac tests and bloodwork. He did have a positive result for a tilt table test, in which he lost consciousness with low blood pressure and pulse very shortly after being raised to an 80 degree angle. He has been put on a beta-blocker and fludorcortisone with little improvement. His doctors can give us no definitive answers. We are currently wondering if this neurally mediated hypotension might be of viral origin, and would like to find out more about hereditary amyloidosis. Any information would be greatly appreciated, and he is severely limited in all his activities at this point. Thanks!