(a)
(b)
(c)
Figure 2: Electrocardiograms recorded after birth (arrows: P wave; asterisk: QRS complex). (a) Severe bradycardia (HR 60–70 bpm), 2 : 1 AVB, and QT interval prolongation. (b) Transient 3 : 1 AVB. (c) Nonsustained ventricular tachycardia.