|No.||Definition||Patient Subgroups||n (%)|
|1||Traditional: all coronary arteries with at least one significant lesion receive a graft||Complete revascularization||1,253 (83)|
|Incomplete revascularization||254 (17)|
|2||Functional: all diseased “primary” coronary segments are bypassed*||Complete revascularization||1,114 (74)|
|Incomplete revascularization||393 (26)|
|3||Number of distal anastomoses are either less than, equal to or greater than the number of diseased coronary segments||Distal sites < number of diseased segments||446 (30)|
|Distal sites = number of diseased segments||518 (34)|
|Distal sites > number of diseased segments||543 (36)|
|4||Number of distal anastomoses to the LAD or other coronary arteries||≥2 distal sites to LAD and to another artery||115 (8)|
|≥2 distal sites to LAD||426 (28)|
|≥2 distal sites to an artery other than LAD||216 (14)|
|<2 distal sites to all arteries||750 (50)|
LAD = left anterior descending coronary artery.
↵* See Table 2for explanation.