Table 2

Authors	Sex	Average age of detection (weeks gestation)	Complete or incomplete CHB	Type of treatment	Heart rate at birth	Other findings
Kim et al.[3]	M	36 weeks gestations	Complete	Conservative	Not described
Chu et al.[4]	M	25 weeks gestations	Incomplete	Conservative	42-87/min
Kim et al.[7]	F	36 weeks gestations	Complete	Temporary insertion of pacemaker at birth	52/min	Moderate patent ductus arteriosus, patent foramen ovale
Chung et al.[10]	M	33 weeks gestations	Complete	Conservative	60-70/min
Jung et al.[14]	M	32 weeks gestations	Complete	Conservative	<70/min	A 2-day old patient died of bradycardia from heart failure

Table 2: Clinical features of 5 NLE cases with CHB.