|
| Conventional surgery (n = 37) | Minimally invasive mitral valve surgery (n = 59) | p-value |
| Baseline demographics |
| ||
| Age (years) | 71.0 ± 9.6 | 59.9 ± 12.0 | < 0.001 |
| Female gender | 14 (38) | 19 (32) | 0.569 |
| Logistic Euroscore (%) | 6.8 ± 5.4 | 3.6 ± 1.6 | < 0.001 |
| Serum creatinine (umol/l) | 92.2 ± 21.8 | 89.5 ± 21.9 | 0.559 |
| Pre-op rhythm Sinus Atrial fibrillation Complete heart block Paced |
18 (49) 18 (49) 1 (2.7) 0 (0) |
45 (77) 12 (22) 0 1 (1.7) |
0.006 0.004 0.204 0.424 |
| Pre-op ejection fraction Normal (>55%) Mild (45% - 55%) Moderate (30% - 45%) Severe (<30%) |
29 (78) 0 (0) 6 (16) 2 (8.1) |
36 (59) 6 (10) 16 (27) 1 (1.7) |
0.077 0.046 0.215 0.308 |
| Mitral valve pathology Degenerative Rheumatic Functional Congenital Previous endocarditis |
27 (73) 1 (2.7) 5 (14) 1 (2.7) 3 (8.1) |
49 (78) 4 (6.7) 5 (0) 0 (0) 1 (1.7) |
0.238 0.384 0.430 0.204 0.126 |
| Peri-operative details |
| ||
| Additional procedures None PFO closure ASD closure LV mass biopsy LA mass excision ASD closure and apical bullectomy |
35 (96) 1 (2) 0 (0) 1 (2) 0 (0) 0 (0) |
53 (90) 4 (6.7) 0 (0) 0 (0) 1 (1.7) 1 (1.7) |
0.412 0.384 1 0.204 0.424 0.424 |
| Bypass time (mins) | 93.6 ± 25.3 (50 - 148) | 165 ± 144.9 (79 - 1230) | <0.001 |
| Cross-clamp time (mins) | 66.2 ± 16.7 31 - 111 | 104 ± 22.9 49 - 154 | <0.001 |
| IABP | 0 | 0 | 0.112 |
| Re-opening for bleeding | 6 (12) | 3 (5) | 0.069 |
| Blood product requirements (units) RBC FFP Platelets |
1.1 ± 2.3 0.8 ± 1.7 0.3 ± 0.7 |
0.2 ± 0.8 0.4 ± 1.0 0.0 ± 0.2 |
0.026 0.199 0.015 |