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Table 1 MRE-derived parameters

From: Elasticity-based determination of isovolumetric phases in the human heart

Parameter Volunteers Patients  
τ A (ms) 136 ± 36 161 ± 46 P = 0.053, k = 0.44
τ A ′ (ms) 138 ± 37 173 ± 50 P = 0.06, k = 0.42
τ sys (ms) 297 ± 64 365 ± 87 P < 0.001, k = 1
τ A sys 0.25 ± 0.06 0.36 ± 0.13 P = 0.01, k = 0.54
τ B (ms) 75 ± 31 133 ± 58 P = 0.005, k = 0.55
τ B ′ (ms) 76 ± 30 142 ± 68 P = 0.006, k = 0.52
τ dia (ms) 682 ± 108 517 ± 91 P = 0.0035, k = 0.61
RR interval (ms) 982 ± 102 888 ± 139 P = 0.08, k = 0.40
SF (%) 56.0 ± 5.5 44.8 ± 12.6 P = 0.008, k = 0.53
  1. Isovolumetric tension time, τ A , and isovolumetric elasticity relaxation, τ B , measured in the left ventricle of volunteers and patients. τ A ′ and τ B ′ correspond to τ A and τ B , normalized by the square root of the RR-interval to account for different heart rates. τ sys and τ dia are the intervals of systole and diastole, respectively. SF denotes the shortening fraction. P-values relate to the difference between volunteers and patients; the Kolmogorov-Smirnov test statistic k is the maximum difference between the groups.