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Table 3 Longitudinal Σ (%) and SR (s-1)

From: Early impairment of contractility reserve in patients with insulin resistance in comparison with healthy subjects

  Controls Insulin resistance
  Strain rate imaging
    Basal
Σ (%) 23.9 ± 6.13 24.5 ± 8.22
SR (sec−1) 1.74 ± 0.32 1.91 ± 0.29
    High dose dobutamine
Σ (%) 26.7 ± 4.32 23.6 ± 5.1
SR (sec−1) 2.87 ± 0.26* 2.45 ± 0.21*
    Δ Stress
Σ (%) +2.2 ± 1.8 (+9%) −0.9 ± 1.7 (−4%)
SR (sec−1) 1.14 ± 0.45 (+66%)* 0.54 ± 0.31 (+27%)*
  1. Abbreviations: SR Strain Rate, Σ Strain. *P < 0.0001.