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Introduction: Chronic diseases are responsible for about 38 million deaths annually and repre-sent about 70% of all deaths worldwide. Among these, rheumatoid arthritis is the most com-mon inflammatory rheumatic dis-ease, representing about 10% of all such disorders. Its inci-dence is approximately 1% of the general popula-tion. Material and method: our study aims to create an experimental model of chronic arthritis on Wistar rats, fe-male sex, to follow the dynamics of joint inflammatory phenomena, the effects of Leflunomide in their evolu-tion and the side effects at cardiac, hepatic and renal level. Discussions: The group of young experimental animals developed more extensive inflamma-tory phenomena compared to the group of adult animals. Leflunomide did not significantly improve the evolution and resolu-tion of inflammatory phenomena in either group. Conclusions: We showed for the first time in the world the effects of Leflunomide on the heart, with the occur-rence of myocardial necrosis ( myocardial infarction) as its main adverse effect.

The prevalence of multiple sclerosis (MS) has been increasing among young people in developing countries over the last years. With the continuous development of new technology, the diagnosis and follow-up of these patients has received new parameters that physicians may use in their practice. This paper reviews the main biomarkers identified through Optical Coherence Tomography Angiography (OCT-A) involved in the development and progression of MS and investigates the role it may have in detecting changes to the central nervous system (CNS).