Skip to main content
. Author manuscript; available in PMC: 2014 Jun 1.
Published in final edited form as: Ann Thorac Surg. 2013 May 2;95(6):2022–2027. doi: 10.1016/j.athoracsur.2013.02.032

Table 1.

Comparison of Volume-Averaged Stress (kPa) in the Myocardium and Acorn Fabric at End-Diastolea

Variable Pre-op CHF (Mean ± SD) Acorn (Mean ± SD) Rotated fibers (Mean ± SD) Tight Acorn (Mean ± SD) LV Only (Mean ± SD)
LV free wall 2.20 ± 0.77 0.99 ± 0.80 0.47 ± 0.32 0.18 ± 0.94 1.33 ± 0.80
RV free wall 2.81 ± 1.45 0.62 ± 0.61 −0.069 ± 0.29 −0.057 ± 0.77 2.88 ± 1.48
Septum 1.59 ± 0.93 0.85 ± 0.65 0.63 ± 0.56 0.41 ± 0.52 1.83 ± 0.88
CSD fabric
 LV free wall 26.1 ± 2.64 35.8 ± 3.33
 RV free wall 21.3 ± 3.60 40.2 ± 6.62
a

Note that myocardial stress is in the myofiber direction and fabric stress is in the circumferential direction. Note also that the ventricular pressure was taken from the measured values of the cardiomyopathy case and applied to all of the Acorn cases (left ventricular end-diastolic pressure = 8 mm Hg and right ventricular end-diastolic pressure = 5 mm Hg).

CH = congestive heart failure; CSD = cardiac support device; LV = left ventricle; RV = right ventricle; SD = standard deviation.