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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.