Symptom class before mitral balloon valvotomy and alive at 1–3 months follow up in patients with echo score ⩽ 8 and > 8
| Commissure calcification grade | Number of patients | NYHA symptom class before balloon valvotomy | NYHA symptom class at 1–3 month follow up | Change in NYHA symptom class |
| Patients with echo score ⩽ 8 | ||||
| 0/1 | 200 | 2.9 (0.7) | 1.6 (0.8) | 1.2 (0.7) |
| 2/3 | 27 | 3.1 (0.6) | 2.2 (0.8) | 0.9 (0.8) |
| (NS) | (p < 0.01) | (p < 0.05) | ||
| Patients with echo score ⩽ 8 | ||||
| 0/1 | 48 | 3.4 (0.7) | 2.2 (1.0) | 1.2 (0.8) |
| 2/3 | 19 | 3.4 (0.7) | 2.2 (0.7) | 1.2 (0.8) |
| (NS) | (NS) | (NS) | ||
Values are mean (SD).