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.