RV function
As shown in Figure 1, a normal TAPSE was recorded in all healthy subjects, but the TAPSE was significantly decreased in patients with COVID-19 pneumonia. Further, the TAPSE was significantly lower in critically severe patients than in severe patients (P = 0.0128). 3 (8.6%) severe and 5 (35.7%) critically severe patients had a reduced TAPSE (< 17mm).
The echocardiographic parameters of RV function in patients with COVID-19 pneumonia are shown in Table 2. Tricuspid regurgitation was present in 21 (60.0%) severe and 13 (92.9%) critically severe patients, and there were no statistically significant differences in PASP and TRPG between the two groups (P > 0.05). Patients with COVID-19 pneumonia had a significantly higher PAD than healthy subjects (P < 0.0001). The IVCmax and IVCmin were significantly increased in critically severe patients than in healthy subjects and severe patients (P < 0.01), whereas ICV-CI was significantly decreased (P < 0.05).