Abstract 11425: Association Between Obstructive Coronary Disease and Diabetic Retinopathy: A Cross-Sectional Study of Coronary Angiotomography and Digital Retinal Images

Introduction: Diabetic retinopathy (DR) and obstructive coronary artery disease (OCAD) are the main microvascular and macrovascular complications of diabetes mellitus (DM), respectively. The assessment of DR by means of spectral domain optical coherence tomography (SD-OCT) and angiography (OCTA) conferred a remarkable progress.

Objective: investigate if SD-OCT and OCTA can detect DR that is associated with OCAD, determined by coronary angiotomography (CCTA)

Hypothesis: DR, assessed by OCTA and OCT-SD, is associated with OCAD, assessed by CCTA

Methods: In this single-center, cross-sectional, single-blind study, patients with DM who had undergone CCTA in the previous 3 years (independent indication) were eligible. They were divided according to the presence of OCAD in two groups and underwent SD-OCT and OCTA. The association between OCAD and DR was evaluated through uni and multivariate analysis and another analysis was performed to identify variables independently associated with the presence of DR.

Results: We included 171 patients, 87 OCAD and 84 without OCAD. Age (66 vs 64 y,p=0.28), DM duration (12 vs 13 y, p=0.5) and HbA1c (7.5% vs 6,9%,p=0.08) did not differ. Patients with OCAD were more frequently men (74% vs 38%, P<0.01), had a higher prevalence of insulin use (52% vs 38%, p<0.01) and 64% had already undergone some type of revascularization. SD-OCT and OCTA revealed a higher prevalence of DR (48% vs 22%,p=0.01). The main findings were: microaneurysms (25% vs 13%,p=0.04), intraretinal cysts (22% vs 8%, p=0.01) and areas of reduced capillary density in the superficial retinal plexus (46% vs 20%,p<0.01).We also found lower mean vascular density (MVD) (15.7 vs 16.5, p=0.049) and lower circularity of the foveal avascular zone(FAZ) (0.64±0.1 vs 0.69±0.1, p= 0.04).There were significant and negative correlations between Duke coronary score and MVD (r=-0.189; p=0.03) and circularity of the FAZ (r=-0,206; p= 0.02). In an adjusted model, presence of OCAD increased the chance of DR (OR 4.05 [1.4 -11.6], p<0.01). OCAD, DM duration and insulin use were independently associated to DR.

Conclusions: OCAD was associated with a greater chance of presenting DR. OCAD, longer DM duration and insulin use were independently associated to the presence of DR.