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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.