Infections with the COVID-19 virus lead to a high number of critical ill patients in need of hospitalization and respiratory support. Heart Rate Variability (HRV) is based on the fluctuation of the heartbeat over time . It has been extensively investigated in cardiac patients , patients with diabetes and in different acute conditions. This prospective observational study intends to explore relevant associations between linear and nonlinear HRV parameters and morbidity and mortality in inpatients suspicious for COVID-19 infection admitted to the hospita