The purpose of this study is to understand routine use of FFR and alternate indices in clinical practice. This study will determine the use and clinical outcome of FFR-guided PCI in patients presenting with either stable coronary artery disease, or in patients presenting with Acute Coronary Syndrome (ACS) on culprit and non-culprit lesions as well as during index and secondary procedures.
The study will also collect data on the routine use of coronary physiologic measurements such as adenosine-induced hyperemia FFR, FFR by contrast-induced hyperemia,
