Table 2:
The results of septal myectomy in patients with previous ASA
| Variable | Value |
||||
|---|---|---|---|---|---|
| Before surgery | At discharge | 2 years after procedure | P-value | ||
| NYHA functional class | |||||
| I, n (%) | 1 (6.3) | 2 (12.5) | 4 (25) | 0.038 | |
| II, n (%) | 7 (43.8) | 14 (87.5) | 12 (75) | 0.047 | |
| III, n (%) | 8 (50) | 0 (0) | 0 (0) | 0.019 | |
| IV, n (%) | 0 (0) | 0 (0) | 0 (0) | <0.001 | |
| Postoperative echocardiography data | |||||
| Peak SPG on LVOT at rest or on exertion, mmHg; median (IQR) | 86 (75–104.7) | 18.8 (14.3–26) | 20 (16–22) | <0.001 | |
| SAM, n (%) | 15 (93.75) | 0 (0) | 0 (0) | 0.014 | |
| Mitral regurgitation degree, n (%) | |||||
| 0 | 0 (0) | 0 (0) | 1 (6.3) | <0.001 | |
| 1 | 3 (18.8) | 15 (93.7) | 15 (93.7) | 0.016 | |
| 2 | 11 (68.8) | 1 (6.3) | 0 (0) | 0.029 | |
| 3 | 2 (12.5) | 0 (0) | 0 (0) | 0.011 | |
| 4 | 0 (0) | 0 (0) | 0 (0) | <0.001 | |
| LV basal septum, mm; median (IQR) | 22.5 (21–26) | 14 (13–15.3) | 14 (13.3–16) | <0.001 | |
| LV posterior wall, mm; median (IQR) | 13 (12.3–15) | 13 (12.3–14) | 13 (12.3–14) | 0.083 | |
| LA diameter, mm; median (IQR) | 35 (42–48.5) | 42 (40–46.3) | 42 (40–44.8) | <0.001 | |
| EDV, ml; median (IQR) | 87.5 (75.3–97.5) | 91 (87.5–101.5) | 93 (88.3–102) | 0.016 | |
| AML, mm; median (IQR) | 38 (36–40.5) | 34.8 (32.5–36.3) | 33.5 (31–35.8) | <0.001 | |
| EF, %; median (IQR) | 64.5 (61.3–65) | 61.3 (60.5–64.8) | 60.5 (58.3–63) | 0.032 | |
Given P-values are the comparisons between preoperative and late follow-up data.
AML: anterior mitral leaflet; ASA: alcohol septal ablation; EDV: end-diastolic volume; EF: ejection fraction; ICD: implantable cardioverter-defibrillator; LA: left atrium; LV: left ventricle; LVOT: left ventricular outflow tract; NYHA: New York Heart Association; SAM: systolic anterior motion; SCD: sudden cardiac death; SD: standard deviation; SPG: systolic pressure gradient.