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Table 4 t-test for quantitative variables (QV) peak signal intensity (A), myocardial blood flow velocity (β) and myocardial blood flow (Axβ) at rest, stress and their respective reserves, if no ischaemia or ischaemia at SPECT.

From: Quantitative detection of myocardial ischaemia by stress echocardiography; a comparison with SPECT

  

No Ischaemia at SPECT

Ischaemia at SPECT

QV

CA

Rest

Stress

Reserve

Rest

Stress

Reserve

A

All

46.9 ± 14.6

55.7 ± 10.1

1.13 ± 0.60

44.3 ± 15.3

52.0 ± 9.6

1.33 ± 1.26

A

   LAD

48.7 ± 9.7

56.7 ± 11.7

1.05 ± 0.32

51.2 ± 7.9

51.3 ± 4.9

0.86 ± 0.20 *

A

   LCx

37.1 ± 14.1

53.8 ± 6.5

1.48 ± 0.91

26.0 ± 12.4

46.7 ± 1.3 **

2.78 ± 2.00

A

   RCA

54.9 ± 13.3

56.3 ± 10.9

0.92 ± 0.28

51.5 ± 13.5

57.2 ± 17.0

0.82 ± 0.34

β

All

1.12 ± 0.41

4.7 ± 3.3

2.52 ± 1.98

1.26 ± 0.38

3.2 ± 1.6 **

1.55 ± 0.87 *

β

   LAD

1.15 ± 0.36

3.8 ± 1.6

1.77 ± 0.75

1.28 ± 0.25

2.7 ± 1.3

1.20 ± 0.59 *

β

   LCx

1.16 ± 0.47

6.4 ± 4.3

3.58 ± 2.74

1.04 ± 0.26

3.9 ± 2.3

2.39 ± 1.14

β

   RCA

1.04 ± 0.40

4.1 ± 2.8

2.28 ± 1.59

1.51 ± 0.64

3.4 ± 1.8

1.41 ± 0.65 *

Axβ

All

55.7 ± 32.4

261 ± 18

3.54 ± 4.60

59.6 ± 31.5

172 ± 100 **

2.87 ± 4.13

Axβ

   LAD

60.2 ± 26.9

222 ± 118

2.21 ± 1.38

68.0 ± 17.2

138 ± 58 **

1.11 ± 0.71 *

Axβ

   LCx

47.0 ± 34.5

346 ± 235

6.20 ± 7.24

28.5 ± 16.7

187 ± 111

7.91 ± 6.18

Axβ

   RCA

60.2 ± 33.7

232 ± 166

2.53 ± 2.17

79.7 ± 45.8

222 ± 147

1.35 ± 0.85 *

  1. CT, coronary territory; *, p < 0.05; **, p < 0.01 for level of significant difference between no ischaemia and ischaemia at SPECT.