<unk>  is a rare congenital heart disease caused by defects in the heart conduction system diagnosed on or before 28 days of life. It can lead to slowed heart rate.
Congenital heart block
Conduction system disease
Cyanotic heart defect
Heart valve dysplasia
Cardiac arrhythmia
Heart block
Congenital cyanotic heart disease
Respiratory sinus arrhythmia