Table 2.

Recommendations regarding pacemaker implantation in patients with congenital heart block (CHB) [102].

Congenital Heart Block AND	Class of Recommendation
Symptomatic bradycardia or low cardiac output	I
Wide QRS escape rhythm, complex ventricular ectopy or ventricular dysfunction	I
Infants with normal anatomy and a ventricular rate less than 55 beats/min	I
Infants with other structural congenital heart disease and a ventricular rate less than 70 beats/min	I
Asymptomatic adults with congenital CHB	IIa
Children beyond the first year of life with an average heart rate less than 50 beats per minute or abrupt pauses two to three times the basic R–R cycle length	IIa