Skip to main content

Table 2 Comparison of computer simulations with experimental data

From: Computer-aided analysis of biochemical mechanisms that increase metabolite and proton stability in the heart during severe hypoxia and generate post-ischemic PCr overshoot

Variable value

Ref.

Simulations (Modes 2–5)

[5]

[12]

[13]

[6]

[7]

[10]

Hypoxia duration (min)

15

12

15

20

15

25

15

Decrease in [PCr] (to % of initial)

14

41

~10

~0

1c–14b

0b–10c

2–19

Time to 50% decrease of [PCr] (min)

1–2

–

–

1–2

<3

~1

1–2

Decrease in [ATP] (to % of initial)

~50

63

72

2ab–40a, c

66c–74b

50b–60c

46–98

Increase in [P i] (times)

~7

2.8

2.3

–

–

5b–8c

3.2–5.8

Decrease in pH (pH units)

0.87

0.38

0.65

0.6ab–0.9a, c

0.8c–1.0b

0.6b–0.8c

0.36–0.81

Decrease in RPP, LVDP, or VO2 (%)

~30

–

–

22b–56c

10c–20b

30–80

0–50

PCr overshoot (%)

~15

~15

 

10b–20c

3b–9c

15–25

0, 12, 5, 22d

  1. Variable values: changes in metabolite concentrations, pH, and heart work (expressed as RPP, LVDP, or VO2) between normoxia and the end of hypoxia, the time for [PCr] to decrease to 50% of its initial value after the onset of hypoxia, and the size of the PCr overshoot taken from six literature reports are compared with those simulated in Modes 2–5 (involving anaerobic glycolysis, last column)
  2. aAfter 15 min of hypoxia; b Preconditioned; c Not preconditioned; d in Modes 2, 3, 4, and 5