TABLE 2.
Distribution of intraoperative variables
| Variable |
Year of operation |
P | ||
|---|---|---|---|---|
| 1990 to 1994 | 1995 to 1999 | 2000 to June 2005 | ||
| Use of left internal thoracic artery, % | 40.2 | 60 | 66 | <0.0001 |
| Use of right internal thoracic artery, % | 2.2 | 1 | 1.9 | 0.7 |
| Number of arteries bypassed | 3.4±0.8 | 3.5±0.9 | 3.2±0.8 | 0.02 |
| Duration of CPB, min | 87±29 | 78±33 | 78±33 | 0.03 |
| Duration of XCL, min | 59±20 | 57±21 | 58±26 | 0.7 |
| Off-pump surgery, % | 0* | 4 | 8 | – |
Data are presented as mean ± SD unless otherwise specified.
*
Off-pump surgeries were not performed in the 1990 to 1994 time cohort. CPB Cardiopulmonary bypass; XCL Aortic cross clamp