Tutorial | Part 1: Definitions

Trifurcation

A trifurcation is a division of a mainbranch into three branches of at least 1.5mm. Trifurcations are only scored for the following segment junctions: 3/4/16/16a, 5/6/11/12, 11/12a/12b/13, 6/7/9/9a and 7/8/10/10a.
‘Specify which segments are diseased for lesion X’: one should only fill out those segment numbers of the trifurcation that have a Diameter Stenosis ≥50% in direct contact with the trifurcation.


 
  • One lesion
  • Trifurcation: ‘Yes’
  • 1 diseased segment involved (= segment no.5).