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 6 Correlation between parameters of Doppler of hepatic vein and invasively measured central venous pressure

Linear regression
Continuous Variables	R (Pearson correlation coefficient)	R square	P value
Hepatic vein retrograde flow velocity (A wave)	− 0.116	0.014	0.480
Hepatic vein retrograde flow velocity time integral (A wave)	− 0.080	0.006	0.630
Hepatic vein antegrade systolic velocity (S wave)	− 0.136	0.019	0.389
Hepatic vein antegrade systolic velocity time integral (S wave)	− 0.191	0.037	0.225
Hepatic vein antegrade diastolic velocity (D wave)	− 0.155	0.024	0.326
Hepatic vein antegrade diastolic velocity time integral (D wave)	− 0.143	0.020	0.366
Hepatic vein V Wave velocity	0.009	0.000	0.956
Hepatic vein V Wave velocity time integral	0.087	0.008	0.598
Hepatic vein maximal forward velocity	0.169	0.028	0.285
Hepatic vein minimal forward velocity	0.236	0.056	0.133
Hepatic vein systolic filling fraction	0.006	0.000	0.972
Hepatic vein systolic velocity to diastolic velocity ratio	0.052	0.003	0.748

Pearson Chi-square or Fisher’s exact test
Categorical variables	P value
Hepatic vein systolic filling fraction > 55%	0.091
Hepatic vein systolic velocity/diastolic velocity ≤ 1	0.689