Skip to main content

Table 2 Comparison between both groups regarding QT parameters

From: Can QT dispersion improve the accuracy of stress ECG TMT in detecting myocardial ischemia in chronic stable CAD patients? A stress myocardial perfusion imaging study

Variables

Group 1

Group 2

t value

P value

Ischemia

No ischemia

Mean

SD±

Mean

SD±

Age (years)

60.6

8.640

58.92

9.56

−0.921

0.359

QTd rest (ms)

34.24

13.913

15.7

5.20

−8.826

0.000

QTd exercise (ms)

30.12

13.120

21.52

11.45

−3.493

0.001

HR rest (bpm)

82.14

15.389

79.56

12.64

−0.916

0.362

HR exercise (bpm)

135.84

16.146

137.4

16.23

0.481

0.631

QTd difference

4.12

19.809

−5.82

12.03

3.033

0.003

EF% TTE (Simpson)

52.66%

8.653%

62.14%

6.31%

6.259

0.000

EF% MPI

53.18%

6.921%

62.22%

4.14%

7.925

0.000

  1. bpm beat per minute, HR heart rate, SD standard deviation, ms milliseconds