Table 2.
Electrocardiographic and Echocardiographic Responses between the Snare and Conventional Groups.
| Total (N = 262) |
Snare Group (N = 20) |
Conventional Group (N = 242) |
p Value | |
|---|---|---|---|---|
| Follow-up ECG | ||||
| Time to ECG, days | 398 ± 198 | 347 ± 308 | 403 ± 185 | 0.436 |
| Follow-up QRS duration, msec | 136 ± 20 | 134 ± 16 | 136 ± 21 | 0.795 |
| ∆ QRS duration from baseline, msec | −34 ± 26 | −38 ± 19 | −34 ± 27 | 0.446 |
| Follow-up echocardiogram | ||||
| Time to echocardiogram, days | 423 ± 229 | 375 ± 323 | 428 ± 220 | 0.528 |
| LV ejection fraction, % | 40 ± 14 | 42 ± 14 | 39 ± 14 | 0.409 |
| LVEF improvement from baseline, % | 12 ± 13 | 12 ± 13 | 12 ± 13 | 0.929 |
| LVESV, mL | 119 ± 66 | 119 ± 75 | 119 ± 65 | 0.980 |
| LVESV reduction from baseline, % | 27 ± 33 | 18 ± 48 | 28 ± 31 | 0.501 |
| Responder * | 116 (60.7) | 10 (62.5) | 106 (60.6) | 1.000 |
| Super-responder † | 80 (41.9) | 6 (37.5) | 74 (42.3) | 0.915 |
Values are mean ± standard deviation or n (%). Abbreviations: LV, left ventricle; LVEF, left ventricle ejection fraction; LVESV, left ventricle end-systolic volume; ECG, electrocardiography. * Responder was defined as patients with LVEF improvement from baseline ≥10% or LVESV reduction from baseline ≥15%. † Super-responder was defined as patients with LVEF improvement from baseline ≥20% or LVESV reduction from baseline ≥30%.