Fig. 3From: Congenitally corrected transposition of the great arteries and implantation of a leadless pacemaker: a case reportECG at VVI 60 beats/min. The electrocardiogram shows that the main wave in leads II, III, and avF is directed upward, and the QRSd is about 120 ms, which is narrower than that of the apical pacing patternBack to article page