. Author manuscript; available in PMC: 2014 Mar 1.

Published in final edited form as: J Perinatol. 2013 May 16;33(9):675–680. doi: 10.1038/jp.2013.35

Table 1.

Means and standard deviations for ECHO and ICG parameters at three stages of pregnancy in the left later recumbent supine position with Pearson correlations (r) and p values

Parameter	ECHO	ICG	ECHO	ICG	ECHO	ICG
Parameter	Mean ± SD	Mean ± SD	Mean ± SD	Mean ± SD	Mean ± SD	Mean ± SD
Time period	Antepartum (n =26)		Intrapartum (n = 18)		Postpartum (n = 20)
Stroke Volume (ml)	74 ±21	84 ± 24	78 ± 23	81 ± 24	76 ± 19	67 ± 22
Stroke Volume (ml)	r = 0.44 (p = .023)^*		r = 0.77 (p = .000)^**		r = 0.19 (p = .423)
Cardiac Output (l/min)	5.8 ± 1.6	6.4 ± 1.9	5.6 ± 1.3	5.8 ± 1.5	5.6 ± 1.1	5.0 ± 1.6
Cardiac Output (l/min)	r = 0.25 (p = .223)		r = 0.71 (p = .001)^**		r = 0.23 (p = .329)
Systemic Vascular Resistance (dynes sec/cm⁵)	993 ± 392	921 ± 319	1,116 ± 242	1,093 ± 314	1,079 ± 184	1,324 ± 473
Systemic Vascular Resistance (dynes sec/cm⁵)	r = 0.56 (p = .004)^**		r = 0.66 (p = .003)^**		r = 0.34 (p = .146)
Acceleration Index (per 100 sec²)		100 ± 38		109 ± 23		101 ± 30
Velocity Index (per 1000 sec)		63 ± 18		65 ± 11		58 ± 14
Systolic Time Ratio		0.25 ± 0.03		0.25 ± 0.05		0.32 ± 0.12
Pre-Ejection Period (msec)		76 ± 8		74 ± 6		83 ± 16
Left Ventricular Ejection Time (msec)		303 ± 23		292 ± 42		266 ± 61

^**

p < .005;

p < .05