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Vasovagal Syncope — NDEB AFK MCQ

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EasyMedical Emergencies in DentistryVasovagal SyncopeNDEB AFK

A patient in the dental chair suddenly becomes pale, diaphoretic, and loses consciousness. Blood pressure is low and pulse is slow (bradycardia). What is the most likely diagnosis?

Educational content. Not a substitute for clinical judgement or local policy.

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Correct answer: B — Vasovagal syncope

Vasovagal syncope (fainting) is the most common medical emergency in the dental office. It is triggered by anxiety, pain, or stress. The parasympathetic (vagal) response causes bradycardia and peripheral vasodilation, leading to hypotension and cerebral hypoperfusion. Management: place supine with legs elevated (Trendelenburg position), ensure patent airway, loosen restrictive clothing, apply cool cloth to forehead. Consciousness typically returns within seconds to minutes.

Reference: Malamed – Medical Emergencies in the Dental Office, 8th ed., 2022