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Table 2 Hemodynamic data obtained from computational simulation of SPS, non-valved RV-PA shunt, and valved RV-PA shunt

From: Norwood procedure with non-valved right ventricle to pulmonary artery shunt improves ventricular energetics despite the presence of diastolic regurgitation: a theoretical analysis

 

Mathematical models

SPS

Non-valved RV-PA

Valved RV-PA

Shunt diameter (mm)

3.0

3.5

4.0

4.0

5.0

6.0

4.0

5.0

6.0

Heart rate (beats/min)

160

160

160

Systolic systemic artery pressure (mmHg)

83.9

87.0

90.9

75.7

76.3

77.0

75.7

76.2

76.9

Diastolic systemic artery pressure (mmHg)

46.6

45.0

43.4

51.9

51.9

51.9

51.9

51.8

51.9

Mean systemic artery pressure (mmHg)

58.6

58.7

58.7

58.7

58.7

58.7

58.7

58.7

58.7

Mean PA pressure (mmHg)

10.4

13.8

17.3

7.50

9.83

11.9

8.98

12.6

16.2

RV forward flow (l/min)

1.60

1.86

2.14

1.53

1.86

2.19

1.51

1.81

2.10

Q p (l/min)

0.77

1.04

1.32

0.55

0.73

0.90

0.68

0.98

1.27

Q s (l/min)

0.83

0.82

0.82

0.83

0.83

0.83

0.83

0.83

0.83

Q p/Q s

0.94

1.26

1.62

0.66

0.88

1.09

0.81

1.18

1.54

Diastolic run-off (l/min)

0.52

0.69

0.85

      

Diastolic regurgitation (l/min)

   

0.15

0.29

0.47

   

SaO2 (%)

74.7

80.4

83.9

65.4

73.5

77.8

71.5

79.3

83.4

SvO2 (%)

53.9

59.5

62.8

44.8

52.8

56.9

50.8

58.5

62.5

Stressed blood volume (ml)

70.6

75.1

80.0

64.9

67.9

71.4

65.7

69.2

73.2

RVEDV (ml)

21.6

23.3

25.0

19.4

20.8

22.4

19.3

20.6

22.0

Stroke work (mmHg ml)

759

905

1,062

600

713

829

596

704

815

Systolic PVA (mmHg ml)

1,008

1,157

1,315

765

851

949

762

843

934

Mechanical efficiency (%)

75.3

78.2

80.8

78.4

83.8

87.4

78.3

83.5

87.2

  1. SPS systemic to pulmonary artery shunt, RV-PA right ventricle to pulmonary artery shunt, RV right ventricle, PA pulmonary artery, Q p pulmonary blood flow, Q s systemic blood flow, SaO 2 arterial oxygen saturation, SvO 2 venous oxygen saturation, RVEDV right ventricular end-diastolic volume, PVA systolic pressure–volume area