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Table 2 Comparison of carotid viscoelasticity, structure and tensile stress between groups

From: Ultrasound assessment of tensile stress in carotid arteries of healthy human subjects with varying age

VariableGroup A
(n = 23)
Group B
(n = 22)
tP
Viscoelasticity
 SWER kPa10.29 ± 9.5717.24 ± 14.07−2.2360.040
 SWDR (m/s)/kHz11.99 ± 3.5113.97 ± 3.71−2.1290.043
Structure
 R-CIMT (μm)677.6 ± 138.4449.1 ± 131.96.321<0.001
 L-CIMT (μm)674.7 ± 119.8503.9 ± 193.23.976<0.001
 R-CCIDT (mm)8.23 ± 0.896.43 ± 0.405.946<0.001
 L-CCIDT (mm)7.93 ± 0.996.50 ± 0.417.575<0.001
 R-CCIDR (mm)8.57 ± 1.037.00 ± 0.557.095<0.001
 L-CCIDR (mm)8.20 ± 1.097.04 ± 0.565.000<0.001
 R-CCAD (μm)339.9 ± 142.7571.1 ± 148.2−5.946<0.001
 L-CCAD (μm)273.6 ± 98.6535.4 ± 153.9−7.575<0.001
Tensile stress
 R-PTS (mmHg)920.4 ± 160.31073.6 ± 285.8−2.4740.017
 R-MTS (mmHg)783.8 ± 189.9884.4 ± 224.0−1.8120.076
 L-PTS (mmHg)648.1 ± 117.4723.8 ± 195.5−1.7580.084
 L-MTS (mmHg)600.9 ± 108.2644.6 ± 168.2−1.1560.253
  1. SWER Shear wave elastic modulus in electrocardiographic R wave, SWDR Shear wave dispersion in electrocardiographic R wave, L-CIMT Left common carotid intima-media thickness, R-CIMT Right common carotid intima-media thickness; L-CCIDT and R-CCIDT Left and right common carotid inners at end of diastole, respectively, L-CCIDR and R-CCIDR Left and right common carotid inner diameters at end of systole, respectively, L-CCAD and R-CCAD Difference of CCID between diastole and systole on left and right, R-PTS and R-MTS Right carotid peak tensile stress and mean tensile stress, L-PTS and L-MTS Left carotid peak tensile stress and mean tensile stress
  2. 1 dyne/cm2 = 7.5 × 10−4 mmHg