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Related Experiment Videos

Syncope of psychiatric origin.

Francesco Luzza1, Salvatore Di Rosa, Pietro Pugliatti

  • 1Dipto Clinico Sperimentale di Medicina e Farmacologia, Sezione di Cardiologia, Università di Messina, Messina, Italy. francescoluzza@tiscali.it

Clinical Autonomic Research : Official Journal of the Clinical Autonomic Research Society
|March 27, 2004
PubMed
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Psychiatric disorders can cause transient loss of consciousness, often misdiagnosed as syncope. The Head-Up Tilt Test (HUTT) may help identify these "pseudosyncope" cases, revealing underlying psychiatric conditions.

Area of Science:

  • Neurology
  • Psychiatry
  • Cardiology

Background:

  • The relationship between transient loss of consciousness and psychiatric disorders is not well-established.
  • Historically, psychiatric syncope was considered rare (1-7%), but recent studies report higher incidences (20-81%).

Purpose of the Study:

  • To investigate the utility of the Head-Up Tilt Test (HUTT) in identifying psychiatric causes of transient loss of consciousness.
  • To differentiate between syncope and pseudosyncope.

Main Methods:

  • Review of literature on syncope and psychiatric disorders.
  • Analysis of cases where HUTT was used to evaluate unexplained syncope.
  • Observation of clinical features suggestive of psychiatric origin of transient unconsciousness.

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Main Results:

  • Pseudosyncope, characterized by loss of consciousness with normal blood pressure and heart rate, is often difficult to diagnose.
  • Direct observation of spontaneous events is rare, but HUTT has successfully induced and identified pseudosyncope in some patients.
  • HUTT revealed previously undiagnosed psychiatric disorders in patients experiencing pseudosyncope.

Conclusions:

  • HUTT can be a useful tool for the early identification of psychiatric syncope (pseudosyncope).
  • Further prospective research is needed to confirm the utility of HUTT in evaluating patients with suspected psychiatric causes of transient loss of consciousness.