Limitations
Our study has several limitations. First, accumulating evidence has
shown that a minority of COVID-19 patients were associated with cardiac
complications, including acute myocardial injury, acute myocardial
infarction, as well as myocarditis 26-27, which might
result in cardiac structural and electrical changes, causing
arrhythmias and palpitations symptoms. However, these effects were not
investigated in this study, as only 4 of the enrolled patients had mild
elevation of high-sensitive troponin I. Second, since only a small
number of patients received psychological guidance due to the relatively
limited trained psychiatrist, the therapeutic effects of psychological
counseling on palpitations symptoms were not evaluated in the present
study. Third, the sample size of the study was too small. Studies with
larger populations and in multiple centers are warranted.