Abstract
Aim
 The coronavirus disease 2019 (COVID-19) causes many cardiovascular complications. In patients with comorbidities, COVID-19 infection has a more severe course. Although some patients who do not have comorbidities, severe infection and death may occur. In studies, many echocardiographic parameters were found to be impaired in patients with COVID-19 pneumonia. The right ventricular premature inflow-output flow (RVEIO) index is a possible and indirect predictor of the severity of right ventricular dysfunction. The aim of our study is to evaluate the RVEIO index after discharge in patients with moderate-to-severe COVID-19 pneumonia without comorbidities.
 Methods
 The study was conducted in a single center, prospectively. One month after discharge, echocardiography and biochemical tests were performed in 57 patients with moderate-to-severe COVID-19 pneumonia without comorbidities.
 Results
 Pulmonary artery diameter was found to be significantly larger in the severe group [1.9 (1.8-2) vs. 2 (1.9-2.1); p=0.014]. Pulmonary artery acceleration time [140.92±11.70 vs 114.58±12.03; p=0.001)] and RVOT VTI [23.48±1.96 vs 19.18±2.2; p
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