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[Vasovagal syncope]

F Salvucci1, S Leuzzi, A Calciati

  • 1Dipartimento di Medicina Interna, Università, Pavia.

Recenti Progressi in Medicina
|June 1, 1993
PubMed
Summary
This summary is machine-generated.

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New diagnostic techniques like the tilt test clarify vasovagal syncope, characterized by sudden hypotension and bradycardia after prolonged standing. Understanding the vasovagal reflex aids diagnosis and treatment strategies for fainting episodes.

Area of Science:

  • Cardiology
  • Autonomic Nervous System

Context:

  • Syncopal episodes, often unexplained, are increasingly understood through advanced diagnostics.
  • The tilt test is pivotal in diagnosing vasovagal syncope.

Purpose:

  • To elucidate the pathophysiology of vasovagal syncope.
  • To present a diagnostic framework for vasovagal syncope.
  • To review current therapeutic options.

Summary:

  • Vasovagal syncope involves a reflex leading to sudden hypotension and bradycardia, often preceded by autonomic changes and symptoms like nausea and pallor.
  • The reflex is triggered by reduced venous return during orthostasis, activating ventricular mechanoreceptors and altering sympathetic and vagal drives.
  • Diagnostic protocols differentiate patients with and without cardiopathy, guiding further assessment and management.

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Impact:

  • Improved understanding of the vasovagal reflex mechanism.
  • Standardized diagnostic approaches for vasovagal syncope.
  • Guidance on therapeutic interventions including medications and fluid management.