Table 2.
Baseline Characteristics
| Ultra‐Conservative (N=44) | Control (N=39) | Combined (N=83) | P Value | |
|---|---|---|---|---|
| Age, y | 55 (47 to 62) | 57 (48 to 63) | 56 (48 to 63) | 0.51 |
| Male | 34 (77%) | 31 (82%) | 65 (79%) | 0.63 |
| Ethnicity | 0.68 | |||
| White | 33 (75%) | 30 (79%) | 63 (77%) | |
| Black | 8 (18%) | 7 (18%) | 15 (18%) | |
| Other | 3 (7%) | 1 (3%) | 4 (5%) | |
| Heart failure etiology | 0.35 | |||
| Ischemic | 18 (41%) | 19 (51%) | 37 (46%) | |
| Non‐ischemic | 26 (59%) | 18 (49%) | 44 (54%) | |
| Diabetic | 17 (39%) | 17 (41%) | 34 (40%) | 0.53 |
| CRT pacing | 0.84 | |||
| CRT‐ON | 10 (23%) | 10 (27%) | 20 (25%) | |
| CRT‐OFF | 11 (25%) | 10 (27%) | 21 (26%) | |
| No CRT | 23 (52%) | 19 (46%) | 40 (49%) | |
| Comorbidities | 0.52 | |||
| Prior VT/VF therapy | 4 (9%) | 3 (8%) | 7 (8%) | |
| Arrhythmic syncope | 3 (7%) | 2 (5%) | 5 (6%) | |
| RBBB, LBBB, or IVCD | 11 (25%) | 13 (33%) | 24 (29%) | |
| Atrial fibrillation, flutter, or SVT | 9 (20%) | 3 (8%) | 12 (14%) | |
| Destination LVAD therapy | 11 (25%) | 9 (23%) | 20 (24%) | 0.67 |
All values presented as number of patients followed by percent of group, other than age, which is presented as the median and interquartile range. Wilcoxon rank test used for continuous variables and Pearson test used for ordinal variables. CRT indicates cardiac resynchronization therapy; IVCD, intraventricular conduction delay; LBBB, left bundle branch block; LVAD, left ventricular assist device; RBBB, right bundle branch block; SVT, supraventricular tachycardia; VF, ventricular fibrillation; VT, ventricular tachycardia.