Table 2.
Baseline Clinical, Electrocardiographic, and Echocardiographic Characteristics of Responder and Nonresponder Patients
| Responder (n = 39) | Nonresponder | P | |
|---|---|---|---|
| Age (years) | 65 ± 10 | 66 ± 12 | 0.16 |
| NYHA | 3 ± 0.5 | 3.1 ± 0.3 | 0.89 |
| Ischemic CMP (n/%) | 10/26 | 12/43 | 0.09 |
| QRS (milliseconds) | 138 ± 17 | 131 ± 14 | 0.07 |
| Number of leads with fQRS | 4.4 ± 1.8 | 4.2 ± 2.2 | 0.56 |
| Number of patients with fQRS in anterior leads | 17 | 15 | 0.42 |
| Number of patients with fQRS in inferior leads | 21 | 15 | 0.98 |
| Number of patients with fQRS in lateral leads | 18 | 12 | 0.79 |
| LVEDD (mm) | 66 ± 9 | 67 ± 10 | 0.93 |
| LVESD (mm) | 56 ± 8 | 55 ± 13 | 0.51 |
| LAD (mm) | 43 ± 3 | 45 ± 7 | 0.19 |
| RVD (mm) | 24 ± 2 | 25 ± 2 | 0.07 |
| LVEF (%) | 23 ± 6 | 22 ± 7 | 0.64 |
| LVEDV (mm3) | 209 ± 76 | 225 ± 81 | 0.52 |
| LVESV (mm3) | 144 ± 53 | 147 ± 75 | 0.97 |
CMP = cardiomyopathy; fQRS = fragmented QRS; LAD = left atrial diameter; LVEDD = left ventricular end‐diastolic diameter; LVEDV = left ventricular end‐diastolic volume; LVEF = left ventricular ejection fraction; LVESD = left ventricular end‐systolic diameter; LVESV = left ventricular end‐systolic volume;NYHA = New York Heart Association; RVD = right ventricular diameter.