What is the definition of a significant stenosis for revascularization decisions and recommendations in this section?
For revascularization decisions and recommendations in this section, a significant stenosis has been defined as 70% diameter narrowing (50% for left main CAD). Physiological criteria, such as an assessment of FFR, have also been used in deciding when revascularization is indicated, with stenoses with FFR less than 0.80 also being considered to be significant.