Angiographically derived fractional flow reserve (angio-FFR) is used to guide percutaneous coronary intervention (PCI). A study published in the New England Journal of Medicine investigated the effectiveness of angio-FFR in the decision-making process for PCI. Angio-FFR is a non-invasive method that uses angiographic images to calculate FFR. FFR is a measure of the severity of coronary stenosis. The use of angio-FFR can help physicians identify which stenoses require PCI. The results of the study will be available in full soon. The study was published "Ahead of Print", meaning that it has been accepted for publication but has not yet been formally published in a print edition. The goal is to improve PCI decision-making and optimize care for patients with ischemic heart disease.