Conclusion
The interventional cardiologist is above all a clinician, whose diagnosis of coronary artery disease is greatly refined by the systematic anatomic and functional confirmation provided by the various forms of invasive exploration now available. Indeed, the interventional cardiologist has probably become a better pathologist of coronary disease, and certainly a physiopathologist. The nonredundant complementarity of pressure guides and IVUS (or OCT) in correcting the functional and anatomic uncertainties inherent to coronary angiography has, over the years, acquired major IA recommendation in the case of FFR and IIa/b-B/C recommendation as useful and effective in the case of IVUS. These important recent developments now guarantee unambiguous management adapted to each CAD patient’s individual case.