2.3 | Definitions of complete revascularization
Based on the paper of Andrew T.L. et al [11], each and all the 162 patients were classified as complying or not with the four different definitions: Numerical: number of stenotic vessels (a luminal reduction of >_50% in at least one angiographic view) equal to the number of distal anastomoses; Functional:all viable myocardial territories are reperfused; Anatomical Conditional: all stenotic main-branch vessels (diameter exceeding >_1.5 mm) are revascularized; Anatomical Unconditional: all stenotic vessels are revascularized, irrespective of size and territory supplied.
The myocardial viability was assessed with the use of myocardial perfusion scintigraphy. This imaging test was conducted with 99mTc-tetrofosmin and following the stress-rest protocol in use at our hospital. Ultimately, this exam classified the three main myocardial territories as either having or not having myocardial viability.
Each distal anastomosis was counted as a separate graft. Thus, a single sequential conduit counted as more than one graft.
On anatomical definitions, left main trunk stenosis required bypass grafting to both the left anterior descending and left circumflex arteries to achieve complete revascularization.