“…In this study, similar to our results, hospitalization duration, ICU requirement, all-cause mortality, and cardiac mortality were found to be higher in patients with COVID-19 with f-QRS. However, this study revealed that there was a positive relationship between QRS duration and duration of hospital stay, need for ICU, and mortality, but there was no relationship between T inversion and mortality (39). In contrast, no relationship was found between QRS duration and mortality in our study.…”