Quantitative Complexity Theory Used in the Prediction of Head-Up Tilt Testing Outcome
Table 2
Intergroup comparison of complexity, mean arterial pressure (MAP), and heart rate (HR) in the last 300 s before the termination of HUTT.
Time to HUTT_end (seconds)
Variable
Syncope_[yes] n = 54
Syncope_[no] n = 27
300
Complexity (bits)
625.6 ± 848.2
481.3 ± 462.3
HR (bpm)
77.6 ± 13.0
88.9 ± 16.2
MAP (mm Hg)
103.2 ± 16.5
99.1 ± 16.8
270
Complexity (bits)
726.5 ± 1077.4
501.9 ± 509.5
HR (bpm)
79.4 ± 12.8
88.8 ± 16.9
MAP (mm Hg)
102.8 ± 18.2
99.0 ± 17.6
240
Complexity (bits)
795.4±1011.6
380.7±355.4
HR (bpm)
79.5 ± 13.4
88.8 ± 13.8
MAP (mm Hg)
102.6 ± 17.9
98.0 ± 17.4
210
Complexity (bits)
746.4 ± 1142.9
449.1 ± 386.7
HR (bpm)
82.0 ± 14.7
86.2 ± 17.0
MAP (mm Hg)
103.8 ± 19.1
98.9 ± 17.4
180
Complexity (bits)
868.9±1221.8
438.0±475.1
HR (bpm)
86.4 ± 17.5
86.3 ± 14.7
MAP (mm Hg)
103.8 ± 19.0
98.9 ± 17.1
150
Complexity (bits)
790.1±860.9
385.0±435.4
HR (bpm)
85.9 ± 15.3
86.5 ± 13.6
MAP (mm Hg)
103.2 ± 19.1
97.6 ± 18.2
120
Complexity (bits)
847.7±1006.1#
333.4±1006.1#
HR (bpm)
88.9 ± 17.5
87.9 ± 14.7
MAP (mm Hg)
104.1 ± 18.7
98.1 ± 18.4
90
Complexity (bits)
1063.5±1287.7#
360.8±268.7#
HR (bpm)
90.8 ± 19.5
86.4 ± 15.3
MAP (mm Hg)
103.1 ± 18.8
97.1 ± 17.5
60
Complexity (bits)
1320.9±1400.9#
344.3±245.2#
HR (bpm)
91.1 ± 21.6
85.1 ± 14.2
MAP (mm Hg)
101.2 ± 19.9
97.4 ± 17.3
30
Complexity (bits)
1401.3±1519.4#
596.4±1041.2#
HR (bpm)
83.3 ± 21.6
85.1 ± 14.2
MAP (mm Hg)
93.9 ± 20.7
96.4 ± 19.8
Data presented as mean ± standard deviation (SD). HR: heart rate, HUTT: head-up tilt test, MAP: mean blood pressure. Statistically significant intergroup difference (syncope_[yes] vs syncope_[no]) is marked as ; ; #.
