[Vasovagal syncope: diagnosis and management]

Area of Science:

• Cardiology
• Autonomic Neurology
• Syncope Pathophysiology

Context:

• Vasovagal syncope is the predominant cause of syncope.
• The precise pathophysiological mechanisms remain incompletely understood.
• Current diagnostic guidelines emphasize clinical history as primary.

Purpose:

• To review the current understanding of vasovagal syncope mechanisms.
• To evaluate diagnostic modalities, including the tilt test.
• To discuss current management strategies and future research directions.

Summary:

• Vasovagal syncope is hypothesized to result from a paradoxical autonomic nervous system reaction causing hypotension and/or bradycardia.
• Diagnosis is primarily based on patient history, as per European Society of Cardiology recommendations.
• The tilt test serves as a supplementary diagnostic tool but has limitations in sensitivity and is not considered the gold standard.

Impact:

• Highlights the diagnostic challenges in vasovagal syncope.
• Underscores the need for further research into underlying mechanisms.
• Suggests a re-evaluation of pacing as a potential therapeutic option in future studies.