Table 2 Clinical and ultrasound data of stable preterm infants in the early and late NICU admission period.1.

From: Reference ranges of left ventricular diastolic multimodal ultrasound parameters in stable preterm infants in the early and late neonatal intensive care admission period

		Early NICU period (day 3 to 21)					Late NICU period (34 to 37 weeks cGA)					p-value
	percentile	10	25	50	75	90	10	25	50	75	90
HR	bpm	146	152	162	172	179	147	153	164	171	179	0.477
SBP	mmHg	52	55	61	66	71	63	72	76	81	86	<0.001
DBP	mmHg	29	32	36	41	44	33	35	40	44	50	<0.001
Diastolic function
LAvol	ml/kg	0.58	0.71	0.86	1.03	1.24	0.72	0.83	1.00	1.14	1.33	0.001
E	cm/s	33	36	41	48	55	57	70	80	92	97	<0.001
DT	msec	57	72	83	95	108	57	82	92	113	130	0.021
DR	m/s²	3.9	4.4	5.6	6.3	7.3	6.7	7.3	8.5	9.4	11.1	<0.001
A	cm/s	43	51	56	62	70	76	83	91	104	116	<0.001
EA ratio		0.61	0.67	0.73	0.82	0.90	0.67	0.84	0.91	0.96	1.05	<0.001
MV vti	cm	4.4	5.2	5.7	6.6	7.9	7.5	8.7	10.0	11.0	12.1	<0.001
e'	cm/s	2.8	3.1	3.4	3.8	4.6	4.0	4.8	5.6	6.3	6.7	<0.001
a'	cm/s	4.8	5.5	5.9	6.8	7.5	6.6	7.4	8.4	9.7	10.9	<0.001
ea ratio		0.44	0.51	0.58	0.65	0.71	0.50	0.59	0.64	0.73	0.86	<0.001
Ee ratio		9.2	10.6	11.9	13.6	15.4	10.5	12.5	14.0	17.8	21.0	<0.001
LAS_R	%	26	30	34	39	43	26	31	36	40	44	0.054
SR_E	s^-1	1.57	1.84	2.17	2.44	2.79	1.48	2.04	2.40	2.95	3.35	0.036
E/SR_E ratio		14.1	16.1	18.8	23.5	26.4	22.8	26.4	34.5	40.5	52.7	<0.001
Cardiac cycle events
St	msec	164	178	195	204	215	179	201	208	215	223	<0.001
Dt	msec	148	160	177	193	209	146	157	175	193	199	0.359
St/Dt ratio		0.91	0.99	1.11	1.20	1.30	1.06	1.12	1.18	1.26	1.33	<0.001
IVRT	msec	35	40	45	55	58	38	40	44	51	55	0.777
Cardiac shape and size
EDV	ml/kg	1.42	1.66	1.83	2.07	2.34	1.48	1.62	1.94	2.17	2.36	0.263
ESV	ml/kg	0.50	0.56	0.71	0.86	0.99	0.61	0.70	0.82	0.97	1.14	0.002
LVL	mm	19.3	20.9	22.1	23.4	24.5	25.4	26.7	28.7	29.3	30.6	<0.001
LVW	mm	8.7	10.2	11.4	12.7	13.6	14.5	15.3	16.6	17.4	18.1	<0.001
LV SI		1.68	1.75	1.89	2.06	2.22	1.54	1.61	1.69	1.83	1.95	<0.001
LV mass	gr/m²	22.9	25.8	28.7	32.3	35.1	29.0	31.2	36.1	39.5	43.0	<0.001
LV M/V		1.22	1.44	1.62	1.82	2.03	1.00	1.28	1.43	1.63	1.82	0.001
Systolic function
EF	%	49	54	62	68	72	46	49	55	60	67	0.003
LV SV	ml/kg	0.79	0.90	1.13	1.31	1.53	0.72	0.87	1.03	1.23	1.44	0.393
s'	cm/s	3.3	3.7	4.0	4.3	4.7	4.4	4.8	5.5	6.0	6.5	<0.001
S_L	%	15.3	16.1	17.2	19.0	21.1	17.4	18.5	19.4	21.2	22.3	<0.001

Data presented as percentiles. cGA, corrected gestational age. Abbreviations are provided in Table .

Back to article page

Table 2 Clinical and ultrasound data of stable preterm infants in the early and late NICU admission period.1.

Search

Quick links