Vasovagal Syncope Recognition — MFDS Part 1 MCQ

Instant feedback + full explanation. One question, done properly.

EasyHuman DiseaseVasovagal Syncope RecognitionMFDS Part 1

During dental treatment, a patient becomes suddenly pale and sweaty, develops a slow pulse and briefly loses consciousness after experiencing anxiety and pain. Which medical emergency is the most likely diagnosis?

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

Reveal the answer and explanation

Correct answer: D — Vasovagal syncope (faint)

The diagnosis is vasovagal syncope. Anxiety and pain are typical triggers, while pallor, sweating, bradycardia and brief loss of consciousness reflect transient hypotension and reduced cerebral perfusion. Anaphylaxis more typically causes rapidly developing airway, breathing or mucocutaneous features and usually tachycardia. Myocardial infarction usually presents with persistent chest discomfort and autonomic symptoms rather than a brief trigger-associated faint. Stroke causes focal neurological deficits such as facial or arm weakness and speech disturbance. An epileptic seizure is more likely to involve tonic–clonic movements, cyanosis, tongue biting or a postictal period. The combination in this stem is therefore characteristic of a vasovagal faint.

Reference: Walsall Healthcare NHS Trust/British Dental Association, Medical Emergencies in the Dental Practice, Syncope section, May 2020, hosted by SDCEP Practice Support: https://www.psm.sdcep.org.uk/media/3hlkptix/medical_emergencies_in_the_dental_practice.pdf