Table 2 Characteristics of patients in the ICD database stratified by the occurrence of an appropriate ICD discharge. Results are expressed as mean ± standard deviation or n (%)
Appropriate ICD discharge | P-value (2-sided) | ||
|---|---|---|---|
No | Yes | ||
N = 8368 | N = 1952 | ||
Age (year) | 64.43 ± 12.98 | 65.28 ± 12.37 | 0.009 |
Male | 6510 (77.8%) | 1665 (85.3%) | < 0.001 |
Current cigarette smokers | 1126 (13.5%) | 277 (14.2%) | 0.02 |
Implant indication | |||
Primary prevention | 4586 (54.8%) | 827 (42.4%) | < 0.001 |
Secondary prevention | 1749 (20.9%) | 661 (33.9%) | |
Replacement | 2033 (24.3%) | 464 (23.8%) | |
Primary heart disease | |||
Ischemic | 5380 (64.3%) | 1282 (65.7%) | < 0.001 |
Dilated cardiomyopathy | 1821 (21.8%) | 460 (23.6%) | |
Other | 1167 (13.9%) | 210 (10.8%) | |
Atrial fibrillation | 2677 (32.0%) | 681 (34.9%) | 0.014 |
Documented ventricular arrhythmia | |||
Sustained tachycardia, Fibrillation or arrest | 2723 (32.5%) | 910 (46.6%) | < 0.001 |
Non-sustained tachycardia | 992 (11.9%) | 311 (15.9%) | |
None | 4653 (55.6%) | 731 (37.4%) | |
Left ventricular ejection fraction | |||
≤ 30% | 4605 (55.0%) | 1068 (54.7%) | 0.91 |
31–40% | 1498 (17.9%) | 362 (18.5%) | |
> 40% | 1456 (17.4%) | 339 (17.4%) | |
Missing | 809 (9.7%) | 183 (9.4%) | |
Medications | |||
β-adrenoreceptor antagonist | 7204 (86.1%) | 1695 (86.8%) | 0.39 |
ACE inhibitor or ARBa | 6722 (80.3%) | 1632 (83.6%) | < 0.001 |
Spironolactone | 2120 (25.3%) | 520 (26.6%) | 0.23 |
Loop diuretics | 4432 (53.0%) | 1055 (54.0%) | 0.39 |
Digoxin | 1713 (20.5%) | 456 (23.4%) | 0.005 |
Amiodarone | 1543 (18.4%) | 443 (22.7%) | < 0.001 |