Table and figure legends
Table 1. Patients and procedural characteristics. *
Pulse-width=0.4ms.
AVB AV block; BMI body mass index; DAP dose area product; IVSd
interventricular septum in diastole; LADplax left atrial diameter in
parasternal long axis view; LBB left bundle branch; LBBB left bundle
branch block; LVEF left ventricular ejection fraction; pLVAT peak left
ventricular activation time; pQRSd paced QRS duration; RBBB right bundle
branch block.
Figure 1. Illustration of pacing cables connected to the
connector pin (cathode) and to the patient’s body (anode) for
conventional interrupted implantation (A) versus pacing cables connected
to the lead stylet (cathode) with the stylet fully advanced to the tip
of the lead and connected to the patient’s body (anode) for continuous
implantation (B).
Figure 2. Linear regression and limits of agreement between
estimates of unipolar pacing impedance on connector pin vs lead stylet.
CP= connector pin.
Figure 3. Connector pin and lead stylet derived unipolar
his-electrograms (his-EGM), left bundle branch electrograms (LBB-EGM)
and QRS morphology during pacing at final LBBAP position with
nonselective (NS) and selective (S) LBBAP capture.
Figure 4. Evolution of beat-to-beat unipolar lead stylet pacing
impedance values (Ω) during continuous uninterrupted implantation of the
LBBAP lead. Each line represents an individual patient from the
feasibility-group. LS: lead stylet.
Figure 5. Unedited continuous tracing demonstrating LS paced
QRS morphology during continuous LBBAP lead implantation. Selected
values of the beat-to-beat monitored unipolar pacing impedance (Ω) and
pLVAT (ms) are displayed above and under the tracing. ECG speed
13mm/sec. LS: lead stylet. pLVAT: peak left ventricular activation time.