Sejong Hospital Group

To compare the clinical outcomes of fractional flow reserve (FFR)-guided strategy versus intravascular ultrasound (IVUS)-guided stent implantation after angiography-derived FFR-based decision-making.

The aim of the study is to determine whether discontinuation of β-blocker after at least 1 year of β-blocker therapy is noninferior to continuation of β-blocker in patients without heart failure (HF) or left ventricular systolic dysfunction after acute myocardial infarction (AMI).
Prospective, open-label, randomized, multicenter, noninferiority trial to determine whether discontinuation of β-blocker after at least 1 year of β-blocker therapy is noninferior to continuation of β-blocker in patients without HF or left ventricular systolic dysfunction after AMI.

The investigators aim to investigate the prognostic implication of stenosis and plaque features on coronary CT angiography (CCTA), physiologic assessment, and pharmacotherapy after invasive coronary angiography.