Table 2:
Intraoperative variables and comparison between groups
| Variable analysed | CCp (N = 31) | BCp (N = 31) | Overall (N = 62) | P-value |
|---|---|---|---|---|
| Ischaemia (min), mean ± SD | 49.2 ± 30.3 | 53.8 ± 27.8 | 51.4 ± 28.9 | 0.53T |
| Min temperature, median (range) | 32 (32–36) | 32 (30–36) | 32 (30–36) | 0.13MW |
| Ischaemia >40 min, n (%) | 17 (55) | 22 (71) | 39 (63) | 0.29 χ2 |
| CPB (min), mean ± SD | 75.0 ± 28.4 | 79.4 ± 32.2 | 77.2 ± 34.2 | 0.62T |
| Reperfusion (min), mean ± SD | 16.1 ± 7.8 | 14.8 ± 5.4 | 15.5 ± 6.7 | 0.44T |
| Maintenance dose I, n (%) | 15 (47) | 19 (61) | 34 (55) | 0.44 χ2 |
| Maintenance dose II, n (%) | 4 (13) | 3 (10) | 7 (13) | 1.00F |
| Indexed cardioplegia volume (ml/kg), mean ± SD | 35 ± 11 | 38 ± 13 | 36 ± 12 | 0.34T |
| Electrical activity between doses, n (%) | 1 (3) | 2 (6) | 3 (5) | 1.00F |
| DC | 1 | 1 | 2 | 1.00F |
| CUF (ml/kg), median (range) | 35 (11–103) | 31 (8–97) | 34 (8–103) | 0.47MW |
| MUF, n (%) | 19 (61) | 17 (55) | 36 (58) | 0.79 χ2 |
| MUF (ml/kg), median (range) | 25 (22–30) | 24 (13–42) | 25 (13–42) | 0.10MW |
| MUF + CUF (ml/kg), median (range) | 51 (11–128) | 47 (7–138) | 49 (7–138) | 0.24MW |
CPB: cardiopulmonary bypass; CUF: conventional ultrafiltration; DC: electrical cardioversion; MUF: modified ultrafiltration; MW: Mann–Whitney U-test; χ2: Pearson's χ2 test; F: Fisher's exact test; T: Student's t-test.