Table 2. Preoperative data.
| Left atriotomy (n=47) | Transseptal (n=131) | Superior transseptal (n=63) | p | |||||||
| n | % | Mean±SD | n | % | Mean±SD | n | % | Mean±SD | ||
| Ejection fraction (%) | 56.1±8.9 | 56.8±9.0 | 59.1±6.3 | 0.264* | ||||||
| PAP (mmHg) | 40.2±13.1 | 39.5±13.3 | 41.6±12.2 | 0.430* | ||||||
| Left atrium diameter (mm) | 53.5±9.9 | 50.6±10.0 | 50.4±8.8 | 0.162* | ||||||
| Rhythm | 0.051† | |||||||||
| NSR | 32 | 68.1 | 101 | 77.1 | 55 | 87.3 | ||||
| AF | 15 | 31.9 | 30 | 22.9 | 8 | 12.7 | ||||
| PR interval (ms) | 156.5±29.3 | 156.0±26.2 | 158.2±24.2 | 0.718* | ||||||
| NYHA Class | 0.090† | |||||||||
| I | 1 | 2.1 | 4 | 3.1 | 0 | 0 | ||||
| II | 33 | 70.2 | 109 | 83.2 | 53 | 84.1 | ||||
| III | 13 | 27.7 | 18 | 13.7 | 10 | 15.9 | ||||
| Mitral disease | 0.651† | |||||||||
| Rheumatic | 25 | 53.2 | 83 | 63.4 | 34 | 54.0 | ||||
| Non-rheumatic | 22 | 46.8 | 48 | 36.7 | 29 | 46.0 | ||||
| Mitral disfunction | 0.241† | |||||||||
| Regurgitation | 26 | 55.3 | 78 | 59.5 | 45 | 71.4 | ||||
| Stenosis | 5 | 10.6 | 19 | 14.5 | 8 | 12.7 | ||||
| Regurgitation and stenosis | 16 | 34.0 | 34 | 26.0 | 10 | 15.9 | ||||
| SD: Standard deviation; PAP: Pulmonary artery pressure; NSR: Normal sinus rhythm; AF: Atrial fibrillation; NYHA: New York Heart Association; * Kruskal- Wallis test; † Chi-square test | ||||||||||