Intrinsic QRS (ms) |
135.4 ± 29.1 |
131.0 ± 34.6 |
p =
0.505 |
Post-implant paced QRS (ms) |
119.8 ± 21.2 |
116.7 ± 15.2 |
p =
0.443 |
Reduction in QRS Duration |
0.86 ± 0.18 |
0.91 ± 0.23 |
p =
0.314 |
Follow up QRS Duration (ms) |
120.1 ± 20.5 |
115.9 ± 13.5 |
p =
0.336 |
Reduction in QRS Duration |
0.87 ± 0.19 |
0.91 ± 0.24 |
p =
0.519 |
QRS ≤ 120 ms |
26/42 (61.9%) |
29/44 (65.9%) |
p =
0.622 |
R-wave peak time (ms) |
80 ± 22.9 |
76.4 ± 14.5 |
p =
0.370 |
Procedure duration (min) |
124.7 ± 50.4 |
105 ± 28.8 |
p =
0.023 |
Fluoroscopy time (min) |
19.8 ± 15.9 |
13.7 ± 7.4 |
p =
0.019 |
Pacing Parameters |
|
|
|
Post procedure |
|
|
|
Threshold Amplitude (V @ 0.5 ms) |
1.1 ± 1.0 |
0.54 ± 0.3 |
p
< 0.001 |
R-Wave Amplitude (mV) |
8.7 ± 6.1 |
11.9 ± 5.7 |
p =
0.035 |
Impedance (ohms) |
615.3 ± 209.8 |
715.0 ± 154.2 |
p =
0.012 |
First follow up |
|
|
|
Days from implant |
43.4 ± 38.3 |
44 ± 30.2 |
p = 0.944 |
Threshold Amplitude (V @ 0.5 ms) |
1.4 ± 1.046 |
0.7 ± 0.3 |
p
< 0.001 |
R-Wave Amplitude (mV) |
8.6 ± 6.4 |
16.0 ± 4.9 |
p <
0.001 |
Impedance (Ohms) |
454.0 ± 118.4 |
540.3 ±59.6 |
p <
0.001 |
Last Follow-Up |
|
|
|
Days from implant |
398.8 ± 259.3 |
228 ± 124.3 |
p <
0.001 |
Paced QRS duration |
123.0 ± 20.5 |
116 ± 16.1 |
p =
0.186 |
Left Ventricular Ejection Fraction |
50.6 ± 13.9 |
55.5 ± 13.1 |
p =
0.207 |
Bipolar Pacing at Most Recent Follow-Up |
38/41 (92.7%) |
43/43 (100%) |
p = 0.071 |
Unipolar Pacing at Most Recent Follow-Up |
3/41 (7.3%) |
0/43 (0%) |
p
= 0.071 |
Threshold Amplitude (V @ 0.5 ms) |
2.1 ± 2.2 |
0.8 ± 0.3 |
p <
0.001 |
R-Wave Amplitude (mV) |
8.90 ± 6.6 |
16.1 ± 4.5 |
p <
0.001 |
Impedance (Ohms) |
434.2 ± 108.1 |
535.5 ± 56.8 |
p <
0.001 |
Lead revision (%) |
6/45 (13.3%) |
0/42 (0.0%) |
p =
0.014 |