Figure legends
Figure 1 . Electroanatomical map of patient #4 with
congenitally corrected transposition of great vessels and dextrocardia
performed with a multipolar catheter (HD Grid, Abbott). Green tags
correspond to His bundle recording with adequate pacing thresholds. The
lower panel shows the His bundle electrograms recorded with the HD Grid
catheter. SVC: superior vena cava; IVC: inferior vena cava; CS: coronary
sinus; SPV: subpulmonic ventricle.
Figure 2 . Figure 2. Baseline (left) and final paced 12 lead ECG
(right) in the 5 patients with left ventricular septal pacing (LVSP).
Sweep speed 25 mm/s.
Figure 3 . Patient #7 (D-TGA status post Senning atrial switch
operation). Panel A and B show the right (RAO) and left anterior oblique
(LAO) fluoroscopic views of the final lead position. The left bundle
branch pacing (LBBP) lead is indicated with an asterisk. The other
endocardial ventricular lead was implanted as a back-up pacing lead.
Panel C shows the electrogram recorded from the pacing lead tip
corresponding to a large anterior fascicle potential and a non-selective
LBBP beat. Panels D and E show the baseline epicardial paced ECG and the
final LBBP 12-lead ECG, respectively.
Figure 4 . A) mean systemic left ventricular (LV) ejection
fraction at baseline and at last follow-up measured by biplane Simpson’s
method in patients with a systemic LV. B) mean systemic right ventricle
(RV) fractional area change in patients with a systemic RV. C) evolution
of NYHA class from baseline to last follow-up.
Figure 5 . Patient #9 (D-TGA status post Senning atrial switch
operation). Panels A and B show the electroanatomical maps of the PVA
(purple) and SVA (cyan) performed with the CARTO system with yellow tags
representing His bundle electrograms recorded in the PVA. Panels C and D
show the AP and LAO views of the patient with the 3830 lead implanted in
the left anterior fascicle area in the subpulmonic ventricle (red
asterisc). Yellow tags represent His-bundle area extrapolated from the
electroanatomic maps. Panel D shows a spontaneous beat with the anterior
fascicle potential (red arrow) registered at the tip of the 3830 lead
followed by a paced beat showing selective capture of the left bundle.
PVA: pulmonary venous atrium; SVA: systemic venous atrium; Ap:
anteroposterior view; LAO: left anterior oblique view; SVC: superior
vena cava; IVC: inferior vena cava.
Figure 6 . Patient #4 with congenitally corrected transposition
of great vessels and dextrocardia. Panels A and B showing left (LAO) and
right anterior oblique (RAO) fluoroscopic views of the implanted leads.
Note that a radioopaque line (red asterisk) can be seen at the tip of
the ventricular lead in panel B corresponding to the VSD calcified patch
that served as an anatomical reference for lead implantation. Panel C
shows the His electrogram (red arrow) recorded from the lead tip
(unipolar) and non-selective His bundle-pacing. Panels D and E show the
native QRS and final paced QRS with non-selective HBP.
Figure 1.