[Loss of consciousness of unusual etiology in a young patient].

The authors have presented the case of a young woman, who was observed because of repetitive loss of consciousness. The unbalance of the vegetative nervous system (parasympathetic overactivity) was responsible for the syncopic events, which could be prevented by the implantation of pacemaker successfully. The reoccurrence of loss of conciousness after 10 years could be attributed partly to the presence of dysfunction of pacemaker (undersensing+inhibition of myopotential), partly to a passing off the stress situation, with previous status of fever, and the consequent orthostatic hypotension caused by actually inadequat use of nitratvasodilator.