Table 1.
Baseline characteristics.
| Overall | Downgrade | Control | p-value | |
|---|---|---|---|---|
| n= | 66 | 27 | 39 | |
| Male gender (%) | 35 (53) | 12 (44) | 23 (59) | 0.36 |
| Age (SD) | 60 (12) | 63 (12) | 59 (11) | 0.19 |
| EF baseline (%) | 25 (7) | 24 (5) | 25 (8) | 0.58 |
| Non-ischaemic cardiomyopathy (%) | 49 (74) | 18 (67) | 31 (79) | 0.38 |
| Hypertension (%) | 33 (50) | 14 (52) | 19 (49) | 1 |
| Diabetes (%) | 13 (20) | 9 (33) | 4 (10) | 0.05 |
| BMI (SD) | 28 (6) | 29 (5) | 27 (6) | 0.34 |
| NYHA class (%) | 0.56 | |||
| II | 22 (33) | 7 (26) | 15 (38) | |
| III | 42 (64) | 19 (70) | 23 (59) | |
| IV | 2 (3) | 1 (4) | 1 (3) | |
| Sinus rhythm (%) | 60 (91) | 26 (96) | 34 (87) | 0.41 |
| QRS width (ms) | 166 (21) | 158 (21) | 172 (20) | 0.01 |
| Chronic kidney disease* (%) | 24 (36) | 13 (48) | 11 (28) | 0.16 |
| Number of generator exchanges | 0.43 | |||
| 1 generator exchange | 44 (67) | 20 (74) | 24 (62) | |
| ≥2 generator exchanges | 22 (33) | 7 (26) | 15 (38) |
Table indicating baseline characteristics at first CRT implantation. Categorical variable indicated with number of patients and percentage in brackets. Continuous variables indicated with mean and standard deviation.
*
MDRD <60 ml/min.