Limitations
There are some limitations in the present study. First, some data, such as echocardiography data, electrocardiography data, and cytokine level measurements, were lacking from clinical examinations of patients in isolation wards or the ICU, which limits the determination of potential mechanisms of cardiac injury. Second, there may be some errors in measurement of TRPG due to different operators or poor image quality. Mediastinal emphysema occurred in four patients and PASP could not be measured. Third, due to the limited number of COVID-19 patients in a single center, the sample size of this study was relatively small. Therefore, data from larger populations and multiple centers are required to confirm the correlation of PASP with outcomes in COVID-19 patients.