Learning Curve Analyses for Left Bundle Branch Area Pacing with Conventional Stylet-Driven Pacing Leads
Table 2
Electrophysiological characteristics of LBBAP.
All (N = 65)
SSS (N = 12)
AV block (N = 53)
value
Baseline QRS morphology
0.305
Narrow QRS
26 (40.0%)
6 (50.0%)
20 (37.7%)
RBBB
9 (13.8%)
0 (0.0%)
9 (17.0%)
LBBB
9 (13.8%)
3 (25.0%)
6 (11.3%)
Bifascicular block
9 (13.8%)
1 (8.3%)
8 (15.1%)
Trifascicular block
5 (7.7%)
2 (16.7%)
3 (5.7%)
Pacing rhythm
6 (9.2%)
0 (0.0%)
6 (11.3%)
IVCD
1 (1.5%)
0 (0.0%)
1 (1.9%)
Electrophysiological characteristics
His potential observed
23 (35.9%)
7 (58.3%)
16 (30.8%)
0.144
LBB potential observed
37 (56.9%)
10 (83.3%)
27 (50.9%)
0.085
Pacing parameters
Sensed R wave amplitude (mV)
10.6 ± 5.0
10.7 ± 5.5
10.6 ± 4.9
0.970
Ventricular capture threshold (V)
0.9 ± 1.1
0.9 ± 0.3
1.0 ± 1.2
0.576
Ventricular pacing impedance (Ω)
675.1 ± 100.6
611.1 ± 100.3
689.5 ± 95.7
0.013
QRS duration
Baseline QRS duration (ms)
128.6 ± 30.2
122.2 ± 32.8
130.0 ± 29.8
0.422
Post-LBBAP QRS duration (ms)
120.5 ± 20.1
114.7 ± 18.7
121.8 ± 20.3
0.269
Values are presented as mean ± standard deviation or n (%). LBBAP, left bundle branch area pacing; SSS, sick sinus syndrome; AV block, atrioventricular block; RBBB, right bundle branch block; LBBB, left bundle branch block; IVCD; interventricular conduction delay, LBB, left bundle branch; RV, right ventricle; LVAT, left ventricular activation time; ms, millisecond; min, minutes; mV, millivolt; Ω, ohm; A, atrial; , ventricular.
