ABSTRACT
Background and Aim: Awareness of electrocardiographic (ECG) changes is crucial in patients who receive coronavirus disease 2019 (COVID-19) treatment. In this study, we aimed to evaluate ECG parameters in patients under COVID-19 therapy and their relationship with the severity of lung involvement and the disease on the basis of thoracic computerized tomography (TCT) findings and laboratory parameters. Material(s) and Method(s): Of 350 patients hospitalized due to COVID-19 between March 2020 and June 2020, 300 patients with available data were retrospectively analyzed. Blood analysis, electrocardiographic, and clinical findings were evaluated. Six-month follow-up data were also recorded. Result(s): The patients were categorized into two groups: Survivor (n = 206, 68.7%, Group 1) and nonsurvivor patients (n = 94, 31.3%, Group 2). The mean total follow-up period was 125.39 +/- 73.09 days. The mean age was similar in both groups. In multivariate regression analysis that aimed to predict COVID-19 disease severity, it was found that besides increased C-reactive protein and D-dimer levels, and >=50% lung involvement in TCT, which are well known as bad prognostic factors, the corrected QT interval duration (QTc) prolongation >=60 miliseconds (msn) during hospitalization was associated with worse prognosis in COVID-19 patients during follow-up. Conclusion(s): Our study is the first study that demonstrated that the presence of >=60 msn QTc prolongation during hospital stay was found to be the most valuable ECG parameter to predict the prognosis and had a significant association with >=50% lung involvement in TCT in patients under anti-COVID therapy. Close monitoring of this ECG parameter is important both in terms of treatment planning and interpretation of disease progression. Copyright © 2022 Society of Cardiovascular Academy. All rights reserved.