Studies of neurocirculatory effects of long‐term L‐threo‐3, 4‐dihydroxyphenylserine administration in a patient with familial amyloidotic polyneuropathy

— The case is reported of a 57-year-old woman with familial amyloidotic polyneuropathy and concomitant orthostatic hypotension for which L-threo-3,4-dihydroxyphenylserine (L-threo-DOPS) was clinically effective. Testing of autonomic function under telemetric intra-arterial pressure monitoring before and during L-threo-DOPS treatment clearly demonstrated the pathophysiology of the sympathetic nervous system and its modification by L-threo-DOPS.