Variable Bovine valve (n=412) Porcine valve (n=412) p value
Operative mortality 7 (1.7%) 4 (1.0%) 0.544
Length of stay (days) 7.44 \(\pm\ \)4.62 7.11 \(\pm\ \)4.36 0.303
Blood product transfusion 128 (31.1%) 112 (27.2%) 0.250
Reoperation for bleeding 10 (2.4%) 17 (4.1%) 0.240
Duration of intubation (hours) 15.28 \(\pm\ \)59.09 14.69 \(\pm\ \)45.59 0.871
Prolonged ventilation > 24 hours 27 (6.6%) 30 (7.3%) 0.784
Pneumonia 5 (1.2%) 10 (2.4%) 0.297
Stroke 6 (1.5%) 6 (1.5%) 1.000
Renal failure requiring dialysis 7 (1.7%) 6 (1.5%) 1.000
30-day readmission 24 (5.8%) 16 (3.9%) 0.257
Mean aortic valve gradient (mmHg) 9.39 \(\pm\) 5.24 9.31 \(\pm\) 5.59 0.828
Ejection fraction 56.80 \(\pm\) 7.18 56.78 \(\pm\) 7.82 0.972
Aortic valve reintervention 17 (4.1%) 10 (2.4%) 0.240