Figure 2. Current diagnostic criteria.

Summary of definitions used in current CFT and of considerations when performing CFT. ACh: acetylcholine; ANOCA: angina and non-obstructive coronary arteries; CFR: coronary flow reserve; CFT: coronary vasomotor function testing; FFR: factional flow reserve; HMR: hyperaemic microcirculatory resistance; iFR: instantaneous wave-free ratio; IMR: index of microcirculatory resistance; LCA: left coronary artery; NOCAD: non-obstructive coronary artery disease; NTG: nitroglycerine; oCAD: obstructive coronary artery disease; RCA: right coronary artery