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Table 4 Calculation of mean QT intervals and coefficients of variation on all noisy Resultant Vector ECGs by all Automatic Algorithms. T1, T2, T3, S1, S2 and Novel are the algorithms as described in main body of text. Res1, Res2, Res3, Res4, Res5, Res6, Res7 and Res8 are the resultant vector ECGs as described in the main body of text. The mean values and their standard deviations are in milliseconds and the coefficients of variation are in percentages.

From: Accuracy of popular automatic QT Interval algorithms assessed by a 'Gold Standard' and comparison with a Novel method: computer simulation study

 

T1

T2

T3

S1

S2

Novel

Res1

      

Mean

448.72

431.74

466.39

426.04

446.69

493.62

SD

3.43

1.64

14.92

3.88

6.19

0.895

%CV

0.76

0.38

3.20

0.91

1.39

0.18

Res2

      

Mean

406.67

388.46

429.92

365.63

401.16

462.28

SD

2.03

1.06

17.34

7.64

5.38

0.88

%CV

0.50

0.27

4.05

2.09

1.34

0.19

Res3

      

Mean

352.59

348.85

370.44

350.61

364.09

462.87

SD

0.74

0.70

0.81

2.34

3.61

5.68

%CV

0.21

0.20

0.22

0.67

0.99

1.22

Res4

      

Mean

346.10

343.44

385.33

346.83

348.42

490.10

SD

0.71

0.74

1.33

0.64

1.17

0.63

%CV

0.21

0.22

0.34

0.19

0.34

0.13

Res5

      

Mean

447.03

430.49

462.51

427.14

443.69

495.41

SD

1.94

0.78

17.09

3.75

2.11

1.63

%CV

0.43

0.18

3.69

0.88

0.48

0.33

Res6

      

Mean

406.05

388

433.85

367.32

399.15

469.54

SD

1.89

1.01

14.64

7.04

5.93

8.41

%CV

0.47

0.26

3.38

1.92

1.49

1.79

Res7

      

Mean

352.15

348.74

370.77

351.88

361.12

463.72

SD

0.48

0.44

0.92

2.07

3.29

4.58

%CV

0.14

0.13

0.25

0.59

0.91

0.99

Res8

      

Mean

345.64

343.03

385.21

346.59

348.2

493.15

SD

0.58

0.70

1.36

0.60

1.48

0.70

%CV

0.17

0.20

0.35

0.17

0.42

0.14