Patient Characteristics
| Characteristic | All patients* (n = 61) |
|---|---|
| Age (y) | 68 ± 9 |
| Sex (M/F) | 47/14 |
| NYHA class | 3.0 ± 0.5 |
| QRS duration (ms) | 165 ± 36 |
| LBBB | 38 (78) |
| LV dyssynchrony (ms) | 88 ± 41 |
| Rhythm | |
| Sinus rhythm | 49 (80) |
| Atrial fibrillation | 8 (13) |
| Paced | 4 (7) |
| LVEF (%) | 23 ± 6 |
| LVEDV (mL) | 245 ± 81 |
| LVESV (mL) | 192 ± 72 |
| Medication | |
| Diuretics | 57 (93) |
| ACE inhibitors | 51 (84) |
| β-Blockers | 37 (61) |
| Spironolactone | 19 (31) |
| Digoxin | 16 (26) |
| Amiodarone | 17 (28) |
↵* Values in parentheses are percent.
LBBB = left bundle branch block; LVEDV = left ventricular end-diastolic volume; LVESV = left ventricular end-systolic volume.