Sympathetic activation: a potential link between comorbidities and COVID-19, 2020
Topics: autonomic nervous system; COVID-19; diabetes; heart failure; hypertension; kidney disease; obesity; SARS-CoV-2; smoking; sympathoactivation
Authors: Andrea Porzionato, Aron Emmi, Silvia Barbon, Rafael Boscolo-Berto, Carla Stecco, Elena Stocco, Veronica Macchi and Raffaele De Caro
Abstract
In coronavirus disease 2019 (COVID-19), higher morbidity and mortality are associated with age, male gender, and comorbidities, such as chronic lung diseases, cardiovascular pathologies, hypertension, kidney diseases, diabetes mellitus, and obesity. All of the above conditions are characterized by increased sympathetic discharge, which may exert significant detrimental effects on COVID-19 patients, through actions on the lungs, heart, blood vessels, kidneys, metabolism, and/or immune system. Furthermore, COVID-19 may also increase sympathetic discharge, through changes in blood gases (chronic intermittent hypoxia, hyperpnea), angiotensin-converting enzyme (ACE)1/ACE2 imbalance, immune/inflammatory factors, or emotional distress. Nevertheless, the potential role of the sympathetic nervous system has not yet been considered in the pathophysiology of COVID-19. In our opinion, sympathetic overactivation could represent a so-far undervalued mechanism for a vicious circle between COVID-19 and comorbidities.
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