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Table 2 Intra- and post-operative results of the overall population and propensity matched patients

From: Minimally invasive or sternotomy approach in mitral valve surgery: a propensity-matched comparison

  Overall Matched Patients
  MINI STERNOTOMY p-value MINI STERNOTOMY p-value
Variable n = 189 n = 336   n = 158 n = 225  
CPB time (minutes) 141.2 ± 32.6 111.8 ± 33.8 <  0.001 145.6 ± 31.9 110.7 ± 35.9 <  0.001
Cross-clamp time (minutes) 94.4 ± 25.4 85.0 ± 26.1 <  0.001 97.7 ± 25.4 84.8 ± 28.0 <  0.001
Operative time (minutes) 227.6 ± 44.0 227.8 ± 62.3 0.39 232.0 ± 44.5 226.4 ± 66.0 0.01
Concomitant procedure
 Tricuspid annuloplasty 73 (39%) 186 (55%) <  0.001 73 (46%) 116 (52%) 0.35
 Cryoablation 83 (44%) 157 (47%) 0.58 74 (47%) 105 (47%) 1.00
MI 6 (3%) 6 (2%) 0.35 6 (4%) 4 (2%) 0.23
Renal replacement therapy 4 (2%) 21 (6%) 0.03 4 (3%) 6 (3%) 1.00
Cerebrovascular stroke and TIA 6 (3%) 12 (4%) 1.00 5 (3%) 6 (3%) 0.77
 Stroke 4 (2%) 10 (3%) 0.59 3 (2%) 4 (2%) 1.00
Delirium 22 (12%) 30 (9%) 0.36 19 (12%) 17 (8%) 0.16
Pneumonia 10 (5%) 33 (10%) 0.10 9 (6%) 19 (8%) 0.43
Re-exploration for bleeding 8 (4%) 35 (10%) 0.01 5 (3%) 20 (9%) 0.03
Blood loss / 24 h (ml) 668.8 ± 519.7 872.9 ± 865.6 <  0.001 661.7 ± 466.8 832.9 ± 852.0 0.02
Transfusion 106 (56%) 259 (77%) <  0.001 94 (59%) 170 (76%) 0.001
Number of Transfusions 2.5 ± 4.3 5.3 ± 7.1 <  0.001 2.7 ± 4.2 4.6 ± 6.3 <  0.001
Atrial fibrillation 74 (39%) 142 (42%) 0.52 63 (40%) 89 (40%) 1.00
Wound infection 1 (1%) 8 (2%) 0.17 1 (1%) 8 (4%) 0.09
Low output syndrome 9 (5%) 40 (12%) 0.007 8 (5%) 21 (9%) 0.17
Time to extubation (hour) 12.5 ± 13.3 29.6 ± 88.9 0.001 13.0 ± 14.2 20.9 ± 63.2 0.26
Prolonged ventilation 11 (6%) 55 (16%) <  0.001 9 (6%) 30 (13%) 0.02
ICU time (hour) 49.2 ± 54.6 70.3 ± 129.1 0.01 50.5 ± 58.4 63.8 ± 122.1 0.21
Postoperative hospital stay (day) 14.7 ± 10.4 15.4 ± 8.4 0.02 15.2 ± 11.1 15.1 ± 7.4 0.17
Postoperative IABP 2 (1%) 5 (1%) 1.00 1 (1%) 3 (1%) 0.65
Postoperative mechanical support 1 (1%) 5 (1%) 0.43 1 (1%) 3 (1%) 0.65
30-days mortality 1 (1%) 15 (4%) 0.01 1 (1%) 6 (3%) 0.25
  1. CPB cardiopulmonary bypass; MI myocardial infarction; TIA transient ischemic attack; Prolonged ventilation – artificial ventilation > 24 h; ICU intensive care unit; IABP intra-aortic balloon pump