Limitations of the Study
Potential confounder factors such as education level, occupation (employed, unemployed, student, retired) or family status were not analysed because data not or partially available in history of our patients.
Although none of the studied patients was hospitalized due to COVID-19 infection or to respiratory illness, but we were not able exclude the asymptomatic COVID-19 carriers, introducing a potential bias. However it has been shown that asymptomatic viral infection is not associated with significant arrhythmic risk.14