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Table 2 Measured myocardial fiber orientation.

From: Quantitative comparison of myocardial fiber structure between mice, rabbit, and sheep using diffusion tensor cardiovascular magnetic resonance

  Species Septal wall Lateral free wall Anterior free wall Posterior free wall
Range Mouse 129.8 ± 12.9 124.2 ± 18.8 127.7 ± 16.7 123.5 ± 17.9
  Rabbit 82.5 ± 17.9 75.8 ± 15.2 72.7 ± 19.1 78.7 ± 12.8
  Sheep 59.5 ± 16.1 58.2 ± 14.2 52.1 ± 14.3 58.1 ± 15.5
Subepicardial Helix Angle Mouse -58.6 ± 9.53 -50.2 ± 14.7 -35.9 ± 14.6 -46.9 ± 14.4
  Rabbit -42.6 ± 14.9 -29.9 ± 14.6 -27.7 ± 11.4 -23.7 ± 13.9
  Sheep -28.2 ± 19.2 -30.2 ± 8.74 -24.3 ± 9.64 -26.6 ± 9.26
Linearity Mouse 0.98 ± 0.011 0.99 ± 0.011 0.97 ± 0.025 0.98 ± 0.017
  Rabbit 0.93 ± 0.14 0.94 ± 0.038 0.94 ± 0.050 0.97 ± 0.028
  Sheep 0.91 ± 0.070 0.95 ± 0.044 0.95 ± 0.055 0.94 ± 0.052
  1. Fiber orientation is as characterized by the transmural range and linearity of the fiber helix angle, and subepicardial helix angle, as functions of both species and circumferential location of the ROI. Both the angular range and subepicardial angle are reported in degrees, whereas the linearity is dimensionless. All entries are mean ± SD.