Table 3.

Echocardiographic parameters measured before the administration of surfactant (T0), and 2 hours (T1) and 24 hours (T2) after

	T0	T1	T2	p value	p value	p value
				T0 vs T1	T0 vs T2	T1 vs T2
AT/RVET	0.25 ± 0.05	0.30 ± 0.06	0.33 ± 0.06	0.066	0.001	0.011
Left ventricle
E (cm/sec)	40.84 ± 11.84	40.24 ± 4.63	45.85 ± 15.56	0.953	0.272	0.374
A (cm/sec)	51.13 ± 14.98	49.47 ± 7.79	52.12 ± 14.2	0.260	0.925	0.260
E/A	0.81 ± 0.13	0.83 ± 0.13	0.88 ± 0.17	0.192	0.300	0.314
LVO (ml/Kg/min)	204.13 ± 65.24	210.89 ± 76.42	227.91 ± 77.41	0.779	0.041	0.327
RVO (ml/Kg/min)	220.82 ± 95.57	265.08 ± 65.88	256.86 ± 113.09	0.674	0.050	0.889
Left ventricle
S’	3.26 ± 0.51	3.50 ± 0.64	3.52 ± 0.67	0.085	0.372	0.953
E’	4.75 ± 1.01	4.59 ± 0.77	5.02 ± 1.54	0.406	0.593	0.086
A’	4.16 ± 1.13	4.56 ± 1.57	5.05 ± 2.04	0.314	0.124	0.260
Right ventricle
S’	4.64 ± 0.75	4.60 ± 1.05	5.27 ± 0.87	0.859	0.035	0.260
E’	5.47 ± 1.12	5.67 ± 1.12	6.24 ± 1.69	0.214	0.198	0.515
A’	6.88 ± 1.37	7.08 ± 1.78	7.48 ± 0.97	0.678	0.272	0.374
Left ventricle
E/E’	8.77 ± 2.46	8.98 ± 1.60	9.48 ± 3.06	0.953	0.509	0.767
TAPSE (cm)	0.72 ± 0.17	0.73 ± 0.12	0.85 ± 0.13	0.767	0.002	0.008

Data are presented as mean ± SD. Significant p values are reported in bold.

AT: acceleration time; RVET: right ventricular ejection time; LVO: left ventricular output; RVO: right ventricular output; TAPSE: Tricuspidal Annular Plane Systolic Excursion.