isovolumic

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isovolumic

[¦ī·sō¦väl·yə·mik]
(physics)
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The peak early velocities (E'), late diastolic velocities (A'), E'/A' ratio, isovolumetric relaxation time (IVRT), S'-wave velocities, and myocardial performance index (MPI) were recorded.
Using conventional TTE, the mean values of the mitral and tricuspid early diastolic E wave, late diastolic A wave, isovolumetric relaxation times (IVRT), deceleration time (DT) and E/A ratio were calculated from three cycles obtained with Doppler and evaluated according to the American Echocardiography Association guidelines (9).
The time interval 'a' denotes combination of isovolumetric contraction time (IVCT), [22] ejection time (ET) and isovolumetric relaxation time (IVRT).
In the evaluation of diastolic function, a significant increase in the isovolumetric relaxation time after anesthetic induction, was observed in dogs receiving ketamine and diazepam (Table 3), which according to LESTER et al.
It can be seen that weathering in the first and third models is isovolumetric whereas weathering in the second and fourth models is not isovolumetric due to the gravitational compaction.
(5) The test method for measuring isovolumetric adsorption was described in detail above.
The rats were induced with ventricular fibrillation and then resuscitated; it was found that one hour following resuscitation, the mean aortic pressure, ventricular contractility assessment, and isovolumetric contractility values were increased in the group exposed to low concentrations of CORM-2 compared to the control group.
Subclinical hypothyroidism increases isovolumetric relaxation time, decreases endothelial relaxation, and decreases cardiac contractility [5].
Additionally, we used echocardiographic parameters to estimate diastolic function due to limited availability of cardiac catheterization data, and isovolumetric relaxation time was not included in the parameters for assessment of diastolic function.
Reduced systolic and diastolic functions with an ejection fraction of 51% and delayed isovolumetric relaxation time (IVRT) of 102 ms were determined, respectively.
At the same time by increased HR and improving ventricular diastolic function, (increased transmitral protodiastolic pressure gradient, i.e., increased atrial pressure) and shortening of left ventricular isovolumetric relaxation time there is early mitral valve opening and early left ventricular filling by enhanced ventricular suction.
A balloon was inserted into the left ventricle through the left atrium for isovolumetric recordings of left ventricular pressures.