Correlation between echocardiographic estimation of right atrial pressure and invasive measurement of central venous pressure in postoperative pediatric patients with congenital heart disease: a prospective observational study

The Egyptian Heart Journal

Table 8 Results of the linear regression between parameters of the right atrium and invasively measured central venous pressure

Variable	R (Pearson correlation coefficient)	R square	P value
Right atrial vertical (major) diameter (RA_VD)	0.409	0.168	0.010
Right atrial vertical (major) diameter (RA_VD)	0.409	0.168	Central venous pressure = 7.14 + 0.15 × RA_VD
Right atrial horizontal (minor) diameter	0.232	0.054	0.155
Right atrial area (RA_A)	0.384	0.148	0.014
Right atrial area (RA_A)	0.384	0.148	Central venous pressure = 8.73 + 0.41 × RA_A
Right atrial volume	0.261	0.068	0.156
Body surface area-indexed right atrial volume	0.040	0.002	0.831

Fisher’s exact test
Categorical variable	P value
Body surface area-indexed right atrial volume > 15 cm³/m²	1