Table 1.
Baseline characteristics
| Characteristic | All patients (N = 121) | Successful (N = 107) | Failed (N = 14) | P value |
|---|---|---|---|---|
| Age, y | 74 ± 12 | 74 ± 12 | 75 ± 8 | .82 |
| Female | 30 (25) | 26 (24) | 4 (29) | .73 |
| Medical history | ||||
| HTN | 91 (75) | 80 (75) | 11 (79) | .76 |
| DM | 44 (36) | 40 (37) | 4 (29) | .52 |
| CAD | 69 (57) | 59 (55) | 10 (71) | .25 |
| AF | 50 (41) | 44 (41) | 6 (43) | .75 |
| Ischemic cardiomyopathy | 59 (49) | 49 (46) | 10 (71) | .08 |
| Baseline NYHA class 3 or 4 | 64 (53) | 56 (52) | 8 (57) | .42 |
| Baseline NYHA | 2.5 ± 0.9 | 2.5 ± 0.8 | 2.7 ± 0.8 | .54 |
| Echocardiographic parameters | ||||
| LVEF | 35 ± 9 | 35 ± 9 | 34 ± 9 | .55 |
| LVEDD (mm) | 55 ± 12 | 54 ± 12 | 61 ± 8 | .05 |
| LVESV (mL) | 96 ± 49 | 95 ± 46 | 99 ± 52 | .06 |
| LVEDV (mL) | 138 ± 62 | 136 ± 61 | 142 ± 54 | .10 |
| LA volume index (mL/m2) | 55 ± 31 | 54 ± 30 | 58 ± 33 | .04 |
| Electrocardiographic parameters: | ||||
| Baseline QRS (ms) | 157 ± 20 | 156 ± 20 | 172±16 | <.01 |
| Baseline QRS >150 ms | 76 (63) | 62 (58) | 14 (100) | <.01 |
Values are mean ± SD or n (%).
AF = atrial fibrillation; CAD = coronary artery disease; DM = diabetes mellitus; HTN = hypertension; LA = left atrial; LVEDD = left ventricular end-diastolic diameter; LVEDV = left ventricular end-diastolic volume; LVEF = left ventricular ejection fraction; LVESV = left ventricular end-systolic volume; NYHA = New York Heart Association.