Table 1 Mean arterial pressure and inferior vena cava and right atrium dimensions

MAP (mmHg)

HYPO

NR

110 ± 6

107 ± 5

77 ± 4*

70 ± 3*

67 ± 3*

62 ± 3*

RM-CPAP

110 ± 2

97 ± 2

76 ± 2*

71 ± 1*

65 ± 2*

63 ± 1*

NORMO

NR

104 ± 8

101 ± 6

100 ± 6**

103 ± 6**

100 ± 4**

97 ± 4**

RM-CPAP

103 ± 2

103 ± 2

100 ± 2‡

105 ± 3‡

96 ± 3‡

95 ± 2‡

HYPER

NR

106 ± 3

128 ± 2* **#

130 ± 2* **#

131 ± 3* **#

131 ± 2* **#

126 ± 2* **#

RM-CPAP

103 ± 2

126 ± 5*‡§

129 ± 4*‡§

128 ± 4*‡§

124 ± 2*‡§

117 ± 5*‡§

IVC

(mm)

HYPO

NR

1.6 ± 0.2

1.5 ± 0.1

1.2 ± 0.1*

1.0 ± 0.1*

1.0 ± 0.1*

0.9 ± 0.0*

RM-CPAP

1.6 ± 0.2

1.4 ± 0.1

1.1 ± 0.1*

0.9 ± 0.1*

0.8 ± 0.0*

0.7 ± 0.0*

NORMO

NR

1.6 ± 0.1

1.7 ± 0.1

1.6 ± 0.1

1.7 ± 0.0**

1.7 ± 0.0**

1.5 ± 0.0**

RM-CPAP

1.5 ± 0.0

1.5 ± 0.0

1.4 ± 0.0

1.6 ± 0.0‡

1.6 ± 0.0‡

1.4 ± 0.0‡

HYPER

NR

1.4 ± 0.0

2.3 ± 0.2* **#

2.6 ± 0.1* **#

2.5 ± 0.3* **#

2.6 ± 0.3* **#

2.6 ± 0.1* **#

RM-CPAP

1.4 ± 0.0

2.1 ± 0.2* ‡§

2.5 ± 0.1* ‡§

2.6 ± 0.1* ‡§

2.6 ± 0.2* ‡§

2.4 ± 0.2* ‡§

RA

(mm)

HYPO

NR

4.0 ± 0.4

3.9 ± 0.6

3.8 ± 0.4

2.8 ± 0.2*

2.3 ± 0.3*

2.7 ± 0.2*

RM-CPAP

4.2 ± 0.1

3.4 ± 0.1

3.1 ± 0.0*

2.9 ± 0.0*

2.5 ± 0.2*

3.0 ± 0.0*

NORMO

NR

3.5 ± 0.0

3.5 ± 0.0

3.7 ± 0.0

3.5 ± 0.0**

3.6 ± 0.0**

3.3 ± 0.0**

RM-CPAP

3.6 ± 0.1

3.5 ± 0.1

3.6 ± 0.0

3.5 ± 0.0‡

3.6 ± 0.0‡

3.5 ± 0.1‡

HYPER

NR

3.9 ± 0.1

4.8 ± 0.5

6.1 ± 0.4* **#

6.5 ± 0.4* **#

7.1 ± 0.4* **#

7.4 ± 0.0* **#

RM-CPAP

4.1 ± 0.1

6.5 ± 0.5*‡§

7.2 ± 0.3*‡§

7.2 ± 0.3*‡§

7.3 ± 0.3*‡§

7.1 ± 0.2*‡§