Methods and materials
Study setting and
protocols
This prospective cohort study was performed during Iran’s third COVID-19
wave in November 2020 in Rajaie Cardiovascular Medical and Research
Center’s (RCMRC) employees who had been previously infected with
COVID-19. A total of 63 Individuals with an earlier positive reverse
transcriptase-polymerase chain reaction test (RT-PCR) were planned to
undergo echocardiography at two different time points. The early
echocardiography was performed 6 to 8 weeks after COVID-19 recovery, and
the late follow-up echocardiography was done six months after the
COVID-19 onset. Participants who had undergone both early and late
echocardiographic examinations were enrolled in this study. Written
informed consent was obtained before each subject’s study participation.
The manuscript is written and formulated in accordance with the STROBE
checklist (8).