PMC5468569_01
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.
CRIPE2017-6570465.002.jpg
PMC5468569_01_CRIPE2017-6570465.002.jpg
fig2
A grade of 2 : 1 or higher (transiently, 3 : 1) AVB and QT interval prolongation were recorded on electrocardiogram (ECG) (Figures 2(a) and 2(b)). Nonsustained ventricular tachycardia was also observed (Figure 2(c)).