A Clinical Study of Fundus OCTA for the Identification of CMD

Coronary microvascular dysfunction (CMD) carries an increased risk of adverse cardiovascular clinical outcomes. The association between fundus microcirculation changes and coronary microcirculation is not well understood. Optical coherence tomography (OCT) and optical coherence tomography angiography (OCTA) is a new type of optical diagnostic imaging technology for non-invasive detection, which can perform multi-dimensional quantitative assessment of fundus microcirculation. In this study, investigators intend to use the coronary angiography-derived index of microvascular resistance (caIMR) to screen patients with CMD, explore the relationship between relevant parameters based on OCT and OCTA measurements and caIMR, and evaluate the feasibility and clinical value of non-invasive identification of CMD through fundus OCT and OCTA.