Table 1.
Baseline characteristics
| Parameter | Value |
|---|---|
| Age | 69.7 ± 12.3 (46–88) |
| Male | 16 (80%) |
| PR interval | 225.7 ± 11.6 (130–396) |
| HV interval† | 49.6 ± 20.8 (26–106)‡ |
| Narrow QRS | 6 (30%) |
| LBBB | 12 (60%) |
| RBBB | 2 (10%) |
| Ejection fraction | 31.3 ± 11.6 (14–67.3) |
| Ischemic heart disease | 11 (55%) |
| NYHA grade | 2.4 ± 0.7 (2–4) |
| Beta blockers | 18 (90%) |
| ACE inhibitors | 19 (95%) |
| MRA | 12 (60%) |
| Sacubitril | 2 (10%) |
Values are mean ± SD (range) or n (%).
ACE = angiotensin-converting enzyme; ARB = angiotensin receptor blocker; LBBB = left bundle branch block; RBBB = right bundle branch block.
†
HV interval is time from His signal to onset of QRS in intrinsic rhythm.
‡
The values for patients with narrow QRS were mean 35.7 ± 4.6, range 30–42.