Coronary artery disease imaging reporting and data system (CAD-RADS): what radiologists need to know?

Significant Stenosis of the Brachiocephalic Trunk and Moderate Stenosis of the Left Circumflex Artery in Computed Tomography Angiography Images

“…Currently, it is assumed that stenosis < 50% does not result in myocardial ischemia, and thus does not require further diagnostic and intervention procedures. Stenoses > 70% usually cause such myocardial ischemia, which translates into the need for invasive coronary diagnosis with FFR assessment and invasive coronary treatment when ischemia is confirmed in FFR [ 8 , 9 ]. Stenoses of 50–70% are problematic as they may result in myocardial ischemia in some patients, while in other patients they do not have to cause such ischemia.…”