Figure Legends
Figure 1 : A . A
12-lead electrocardiogram (ECG) during sinus rhythm. B . A
12-lead ECG during tachycardia with a cycle length of 240 ms. The ECG
shows a relatively narrow QRS with sharp R wave, a superior left axis
deviation and a right bundle branch block-type configuration. VA
dissociation is also identified.
Figure 2: A . Right anterior oblique (RAO) and superior (SUP)
view of a ventricular muscle activation map during the non-reentrant
fascicular tachycardia (NRFT) , showing centrifugal activation from the
earliest site at the ventricular septum (highlighted in red). The white
circles indicate the sites where Purkinje potentials are recorded during
sinus rhythm along the left anterior and posterior fascicles. The blue
circles indicate the sites where preceding Purkinje potentials are
recorded during the NRFT. The larger blue circle indicates the site of
the earliest Purkinje potential recorded with the multi-spline
duodecapolar catheter. The location of the breakout site to the
ventricular muscle is the apex side of the earliest Purkinje potential
site. We delivered radiofrequency current to the sites with red circle.B . Intracardiac electrogram during the NRFT mapping. The
earliest Purkinje potential, preceding the QRS onset by 34 ms, is
recorded by the electrodes 15-16 (blue asterisk) of the multi-spline
duodecapolar catheter. HBE; his bundle electrogram, CS; coronary sinus,
PEN; PENTARAY catheter.
Figure 3: Twelve-lead electrograms A . during
ventricular tachycardia (VT), and B . during pacing from right
ventricular septum and C . during pacing from left ventricular
inferoseptum. We performed constant pacing from several sites of the
ventricles with variable cycle lengths during the VT, however, only
pacing waveforms were obtained and constant QRS fusion, indicating that
the mechanism of the VT was reentry, could not be confirmed.