Evidence-based On-call

Syncope

Clinical features

Ask about previous episodes of syncope ^a

or seizures ^d

Why?

Many recent episodes of syncope increases the risk of further episodes

Patient	Prognostic Factor	Outcome	CER	OR (95% CI)	NNF+ (95% CI)
syncope ^a	4 or more episodes of syncope in the last year independent	recurrent syncope at 12 months	34%	3.8 (2.1 to 7.0)	1 (1 to 3)