Impact of Stenosis and Plaque Features in Coronary CT Angiography, Physiologic Assessment and Pharmacotherapy on the Clinical Outcomes After Invasive Coronary Angiography

1. Coronary CT angiography (CCTA) and measurement of fractional flow reserve (FFR) will be performed as part of routine clinical practice. The decision to perform CCTA before invasive angiography was at the judgment of the physicians in charge. 2. Physiologic assessment includes delta FFR (lesion-specific) and FFR (vessel-specific) measurement. Delta FFR is defined as a pressure step up across the lesion. Coronary angiography and physiologic assessment will be analyzed by an independent core laboratory (Seoul National University Hospital, Clinical Trial Center, Seoul, South Korea). 3. Stenosis and plaque features on CCTA will be analyzed by an independent CCTA core laboratory (Severance Cardiovascular Hospital, Seoul, Korea), and pericoronary and epicardial fat metrics (fat attenuation index, epicardial fat attenuation index, epicardial fat volume, etc.) will be obtained by an independent cardiac CT fat core laboratory (Tsuchiura Kyodo general hospital, Ibaraki, Japan).