5. Limitations and strengths of the study
This study has several limitations. First, the results are from a single
center and could not be generalized. Second, it is impossible to
differentiate whether NOAF developed due to COVID-19 related cardiac
involvement or due to critical illness itself. Third, we could not
analyze long-term consequences of NOAF. However, the study has some
strengths. We think that our findings are valuable as NOAF development
in critical COVID-19 studied to a lesser extent. Second, the diagnostic
accuracy for NOAF was high as the diagnosis was confirmed by an
intensivist/cardiologist in all cases.