Occlusive lesions of retinal vessels: etiological and patogenetic factors

Background. Vascular pathology of the organ of vision is one of the most urgent problems of ophthalmology, as it is the main cause of vision loss and vision loss. Retinal vein occlusion ranks second after diabetic retinopathy in the world among vascular causes of vision loss. In a significant risk group for the occurrence of occlusions of the retinal vessels are patients with cardiovascular diseases. Today, treatment of patients with coronary heart disease and patho­logy of heart valves is impossible without surgical interventions, most of which require the use of artificial circulation (AC). During the operation of the AC due to prolonged hypothermia, hemodilution, prolonged hypotension, anemia, development of ophthalmologic complications in the early postoperative period is possible. The purpose of the study was to investigate etiological and pathogenetic factors of occlusive lesions of retinal vessels. Mate­rials and methods. The search for sources of Ukrainian and foreign literature for the ana­lytical review was conducted keywords using the open medical scientific database PubMed (USA). At the first stage, 211 sources were selected, of which 66 were selected for this article. Results. Occlusion of the central retinal vein (CVO) deve­lops in 214 people per 100,000 population, mainly in people over 65 years of age. The frequency of branh retinal vein occlusions (BRVO) is 67.2%, of which 82.4% is a occlusion of the superior temporal branch. The main risk factors of CVO are age, hypertension, diabetes, atherosclerosis, glaucoma, coronary heart disease. A small number of sources are found in the literature regarding complications from the organ of vision in patients after cardiac surgery with AC such us thromboembolism of retinal vessels, optic ischemic optic neuropathy, retinal ischemia, optic nerve atrophy, retinal detachment, proliferative vitreoretinopathy. The authors' research showed a multiple increase in blood markers of endothelial dysfunction, including vascular endothelial cadherin (VE-cadherin, VE-C) after surgery. Conclusions. Diseases of the organ of vision due to general or local blood circulation disorders account for 10 to 28%, 2.6% of which lead to blindness. There is a relationship between occlusive lesions of retinal veins and cardiovascular diseases. The main reasons for the development of retinal vein occlusion after cardiac surgery with coronary artery disease are acute inflammation occurring during and immediately after surgery and endothelial dysfunction.