Table 9: Pacemakers for Syncope According to the Heart Rhythm Society.

Recommendation	CoR	LoE
Dual-chamber pacing can be effective in patients ≥40 years with recurrent and unpredictable syncope who have a documented pause ≥3 seconds during clinical syncope or an asymptomatic pause ≥6 seconds.	IIa	B-R
Tilt table testing might be considered to identify patients with a hypotensive response who would be less likely to respond to permanent cardiac pacing.	IIb	B-NR
Pacing might be considered in paediatric patients with recurrent syncope having documented symptomatic asystole and who are refractory to medical therapy.	IIB	BR
Dual-chamber pacing might be considered in adenosine-susceptible older patients who have unexplained syncope without a prodrome, a normal ECG and no structural heart disease.	IIb	C

CoR = class of recommendation; LOE = level of evidence.[1]