Rule 1: TLoC is classified as a vasovagal syncope if the total symptom score is -2 or more, calculated by summing the following if present201:
  • Pre-syncope or syncope with pain or medical procedure (+3)
  • Sweating or warm feeling before TLoC (+2)
  • Pre-syncope or syncope with prolonged sitting or standing (+1)
  • Remembers something about the TLoC (−2)
  • Age at first TLoC at least 35 years (−3)
  • Blue colour noted by bystander (−4)

From: 3, Initial assessment and diagnosis of people who had TLoC

Cover of Transient Loss of Consciousness (‘Blackouts’) Management in Adults and Young People
Transient Loss of Consciousness (‘Blackouts’) Management in Adults and Young People [Internet].
NICE Clinical Guidelines, No. 109.
National Clinical Guideline Centre for Acute and Chronic Conditions (UK).
Copyright © National Clinical Guideline Centre for Acute and Chronic Conditions, 2010.

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