Table 2 Follow-up during and after WCD use
Total number of patients | All patients | Newly diagnosed ICM | Newly diagnosed NICM | ICD explant | Newly diagnosed CMP |
|---|---|---|---|---|---|
LVEF ≤ 35% | LVEF ≤ 35% | LVEF ≥ 35% | |||
n = 105 | n = 43 | n = 41 | n = 15 | n = 6 | |
Wearing days, mean ± SD | 68.8 ± 50.4 | 57.8 ± 42.6 | 69.2 ± 39.6 | 92.5 ± 87.0 | 70.2 ± 31.2 |
Wearing hours/day, mean ± SD | 21.5 ± 3.5 | 21.0 ± 3.8 | 21.3 ± 3.5 | 23.1 ± 1.1 | 22.4 ± 1.7 |
LVEF % baseline, mean ± SD | 28.3 ± 9.8 | 28.9 ± 6.0 | 23.3 ± 6.9 | 32.2 ± 13.3 | 49.0 ± 7.5 |
LVEF % end of WCD use, mean ± SD | 36.1 ± 11.5 | 36.3 ± 10.3 | 34.8 ± 11.1 | 32.9 ± 13.0 | 50.8 ± 8.6 |
(p value of LVEF baseline versus end of WCD use) | (p < 0.001) | (p < 0.001) | (p < 0.001) | (p = n.s.) | (p = n.s.) |
ICD implanted | |||||
Total n (%) | 54 (51.4) | 21 (48.8) | 18 (43.9) | 13 (86.7) | 2 (33.3) |
Days WCD start to ICD implantation, mean ± SD | 103.8 ± 73.7 | 127.7 ± 84.1 | 90.0 ± 36.8 | 94.7 ± 90.3 | 37.0 ± 18.4 |
Single-chamber ICD, n (%) | 8 (7.6) | 3 (7.0) | 4 (9.8) | 0 (0) | 1 (16.7) |
Dual-chamber ICD, n (%) | 4 (3.8) | 1 (2.3) | 0 (0) | 2 (13.3) | 1 (16.7) |
CRT-D, n (%) | 12 (11.4) | 3 (7.0) | 5 (12.2) | 4 (26.7) | 0 (0) |
S-ICD, n (%) | 30 (28.6) | 14 (32.6) | 9 (22.0) | 7 (46.7) | 0 (0) |
No ICD implanted | |||||
Total, n (%) | 51 (48.6) | 22 (51.2) | 23 (56.1) | 2 (13.3) | 4 (66.7) |
LVEF recovery to > 35%, n (%) | 40 (38.1) | 19 (44.2) | 21 (51.2) | 0 (0) | 0 (0) |
Transient WCD indication, n (%) | 4 (3.8) | 0 (0) | 0 (0) | 0 (0) | 4 (33.3) |
Patient refused ICD, n (%) | 5 (4.8) | 2 (4.7) | 2 (4.9) | 1 (6.7) | 0 (0) |
Death during WCD wear, n (%) | 2 (1.9) | 1 (2.3) | 0 (0) | 1 (6.7) | 0 (0) |
Arrhythmic death during WCD wear, n (%) | 0 (0) | 0 (0) | 0 (0) | 0 (0) | 0 (0) |