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Sao Paulo, Aug 25 Survivors of severe Covid-19 infections may have high risk to blood vessel systems in our body in response to mental stress, according to a research.Although many patients recover completely from the disease, previous studies noted cardiovascular condition in patients that survived severe Covid-19 infections.The new research showed that this population presents increased risk factors for cardiovascular complications, such as excessive muscle sympathetic nerve activity (MSNA), which has the acceleration of the heartbeat as one of its duties, in addition to other problems, such as greater stiffness in the main artery of the human body and dysfunctions in peripheral blood vessels, which are responsible for regulating blood flow and blood pressure.For the study, the team from D'Or Institute for Research and Education (IDOR), in partnership with the University of Sao Paulo (USP), analysed 15 patients who had survived severe Covid hospitalisations, in ICUs or wards, with a confirmed RT-PCR diagnosis and oxygenation levels equivalent to or lower than 93 per cent.As a control group, 15 volunteers who had never had the disease, had no comorbidities, and were of similar age and body mass index (BMI) were chosen.To measure the effects of stress, patients and the control group were exposed to a three-minute activity in which slides were projected in front of them and the image changed every two seconds, accompanied by conflicting sounds that were delivered through headphones.At the end of the analysis, it was concluded that all participants noticed a similar increase in the level of stress, but that in patients who had Covid-19, some physiological reactions were discrepant.The researchers said that the MSNA of these survivors is already around 65 per cent higher than that of those who did not have the disease.However, during the stress exposure activity, the increase in MSNA in patients who had Covid was 128 per cent greater than in the control group.The team also measured vascular responses to this stress induction and analysed blood flow, vascular function, and mean arterial pressure across each participant's forearm.The analysis showed that the first two aspects were attenuated in Covid patients, being more than 100 per cent lower when compared to the control group, while mean arterial pressure was similar in all individuals.The study, published in the scientific journal American Journal of Physiology, demonstrates a warning regarding the increased risk for cardiovascular diseases, and that patients who survived severe Covid-19 should remain attentive to routine exams and health care, even after the apparent overcoming of the infection.Disclaimer: This post has been auto-published from an agency feed without any modifications to the text and has not been reviewed by an editor

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