Skip to main content

Advertisement

Table 2 Evolution of left ventricular diastolic function variables

From: Determinants of left ventricular ejection fraction and a novel method to improve its assessment of myocardial contractility

  τ (tau) (ms) LV stiffness (β)
  Before After Before After
Afterload
 Phenylephrine 29.3 ± 2.9 33.5 ± 3.24 0.013 ± 0.003 0.014 ± 0.003*
 Nitroprusside 27.4 ± 3.4 22.4 ± 2.2 0.013 ± 0.003 0.012 ± 0.003
Preload
 Bleeding 27.5 ± 3.5 22.8 ± 3.2 0.012 ± 0.003 0.012 ± 0.003
 Fluid bolus 25.4 ± 4.3 28.9 ± 4.1 0.012 ± 0.003 0.011 ± 0.002*
Contractility
 Esmolol 27 ± 3.8 35 ± 5.4* 0.013 ± 0.002 0.012 ± 0.003
 Dobutamine 27.1 ± 4 24.4 ± 4.5* 0.012 ± 0.002 0.012 ± 0.002
  1. Data are presented as mean ± SD
  2. τ (tau) time constant of the isovolumetric LV pressure relaxation, β LV chamber stiffness constant obtained from the end-diastolic pressure–volume relationship
  3. *p < 0.05, p ≤ 0.001 ,p ≤ 0.0001 versus before stage