Evidence-based On-call

Syncope

Prognosis

Death is more likely with heart disease ^a

Why?

Heart disease increases the risk of dying

Patient	Prognostic Factor	Outcome	CER	RR (95% CI)	NNF+ (95% CI)
unexplained syncope ^a	mild heart disease independent	death at 12 months	9% (5% to 12%)	7.7 (1.6 to 36.4)	2 (1 to 19)
	severe heart disease independent		9% (5% to 12%)	13.5 (2.6 to 70.5)	1 (1 to 7)