Table 2.
Perioperative Outcomes
| Variable | Age < 75 (n = 548) | Age ≥ 75 (n = 148) | P value |
|---|---|---|---|
| Sternotomy, n (%) | 370 (67.6) | 123 (83.7) | <0.001 |
| Stand-alone Maze, n (%) | 198 (36.1) | 13 (8.8) | <0.001 |
| Biatrial Maze, n (%) | 508 (92.7) | 128 (86.5) | 0.021 |
| Post op PM, n (%) | 53 (9.7) | 31 (20.9) | 0.001 |
| CPB time (min), mean (std) | 171.3 (46.6) | 193.6 (56.7) | <0.001 |
| Crossclamp time (min), mean (std) | 82.6 (33.9) | 97.3 (31.9) | <0.001 |
| Overall major complication, n (%) | 75 (13.7) | 34 (23.0) | 0.017 |
| Cerebrovascular accident, n (%) | 9 (1.6) | 3 (2.0) | 0.725 |
| Pneumonia, n (%) | 29 (5.3) | 15 (10.1) | 0.037 |
| Mediastinitis, n (%) | 2 (1.2) | 1 (18) | 1.000 |
| Renal failure requiring dialysis, n (%) | 24 (4.4) | 11 (7.4) | 0.381 |
| Intra-aortic balloon pump, n (%) | 17 (3.1) | 6 (4.1) | 0.604 |
| Reoperation for bleeding, n (%) | 20 (5.7) | 8 (6.7) | 0.662 |
| ICU length of stay (hours), median [IQR] | 54 [26,101.5] | 96.7 [48.3,125.9] | 0.073 |
| Hospital length of stay (days), median [IQR] | 8.0 [6.0,12.0] | 12.0 [8.0,16.0] | <0.001 |
| 30 Day Mortality, n (%) | 12 (2.2) | 9 (6.1) | 0.026 |
Overall major complication rate includes pneumonia, cerebrovascular accident, mediastinitis, intra-aortic balloon pump, renal failure requiring dialysis, reoperation for bleeding. AF = atrial fibrillation, LA = left atrium, STD = standard deviation, LVEF = left ventricular ejection fraction, NYHA = New York Heart Association, PM = pacemaker, BMI = body mass index, CPB = cardiopulmonary bypass, ICU = intensive care unit