Table 2.
Locations of LV Lead Placement and Latest Mechanical Activation.
| De Novo CRT (N = 50) |
CRT Upgrade with RVP (N = 29) |
CRT Upgrade w/o RVP (N = 23) |
p Value (All Groups) |
p Value (Group 1 vs. 2) |
|
|---|---|---|---|---|---|
| LV Lead Location | |||||
| Longitudinal | 0.4 | ||||
| Basal | 9 (18.0) | 7 (24.1) | 9 (39.1) | ||
| Mid-ventricular | 29 (58.0) | 17 (58.6) | 11 (47.8) | ||
| Apical | 12 (24.0) | 5 (17.2) | 3 (13.0) | ||
| Circumferential | 0.6 | ||||
| Anterior | 8 (16.0) | 1 (3.4) | 2 (8.7) | ||
| Anteroseptal | 0 (0.0) | 0 (0.0) | 0 (0.0) | ||
| Inferoseptal | 0 (0.0) | 0 (0.0) | 0 (0.0) | ||
| Inferior | 1 (2.0) | 0 (0.0) | 1 (4.3) | ||
| Inferolateral | 12 (24.0) | 7 (24.1) | 5 (21.7) | ||
| Anterolateral | 29 (58) | 21 (72.4) | 15 (65.2) | ||
|
Location of Latest
Mechanical Activation |
|||||
| Longitudinal | <0.0001 | ||||
| Basal | 14 (28.0) | 25 (86.2) | 16 (69.6) | <0.0001 | <0.0001 |
| Mid-ventricular | 31 (62.0) | 4 (13.8) | 6 (26.1) | <0.0001 | <0.0001 |
| Apical | 5 (10.0) | 0 (0.0) | 1 (4.3) | 0.6 | |
| Circumferential | 0.003 | ||||
| Anterior | 5 (10.0) | 14 (48.3) | 9 (39.1) | 0.0002 | 0.0002 |
| Anteroseptal | 0 (0.0) | 0 (0.0) | 0 (0.0) | ||
| Inferoseptal | 0 (0.0) | 0 (0.0) | 0 (0.0) | ||
| Inferior | 1 (2.0) | 1 (3.4) | 1 (4.3) | 0.8 | |
| Inferolateral | 17 (34.0) | 2 (6.9) | 7 (30.4) | 0.02 | 0.007 |
| Anterolateral | 27 (54) | 12 (41.4) | 6 (26.1) | 0.08 |
Values are n (%).