Neonatal and infant cardiac findings:
Clinical characteristics of groups at the postnatal period are noted in the Table 3. Neonates were similar for demografic features. IVSd and LVPWd values remained higher on postnatal first and follow-up echoes. Both LV mass and LV mass index calculated significantly higher on COVID group (p <0.001). E/A ratio of mitral and tricuspid and Em/Am ratios of both segments of first and follow-up echoes were significantly lower, IVRT of both segments were significantly higher of all periods as an indicator of diastolic dysfunction similar to fetal period (Table 4,5). However, mitral E/Em values of both postnatal echoes were not differed statistically but tricuspid E/Em value of follow-up echo remained statistically higher in COVID group (p <0.01).
On the infant period, MAPSE, TAPSE values do not differ significantly but LVEF (p< 0.01), LVSF (p <0.001), ET of septum (p =0.031) and RV lateral wall (p <0.01) were measured significantly lower and IVCT of RV is higher on COVID group as an indicator for systolic dysfunction (Table 4,5). MPI of both segments were significantly higher on postnatal first and second echoes.
Correlation analysis of mitral and tricuspid E and Emvalues for postnatal second echo in the COVID-19 group showed a strong correlation of mitral E and LV MPI (Rho=,609; p <0.001). There is a moderate positive correlation between tricuspid E and LVEDD (Rho=,398; p =0.016), a strong positive correlation between tricuspid E and LV mass (Rho=,586; p <0.001), moderate positive correlation between tricuspid E and LVMi (Rho=,403;p =0.015).