isovolumic


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isovolumic

[¦ī·sō¦väl·yə·mik]
(physics)
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Isovolumic relaxation time was shorter than 70 ms, and the deceleration time of peak E reduced significantly (<150 ms).
Mitral 'E' velocity (peak velocity of early mitral flow), mitral 'A' velocity (peak velocity of late mitral flow), E/A ratio (velocity of diastolic early filling wave/velocity of late filling wave), annular tissue motion (denoted by e'), E/e' ratio, Isovolumic Relaxation Time (IVRT), deceleration time of mitral 'E' curve (DT of E) and left atrial diameter was calculated to find the presence of left atrial enlargement.
Early detection of right ventricular systolic dysfunction by using myocardial acceleration during isovolumic contraction in patients with mitral stenosis.
010 Aortic diameter (Ao) (cm), left atrium diameter (LA) (cm), left atrium and aorta ratio LA/Ao; internal right ventricular diameter during diastole (IRVDd) (cm), interventricular septum thickness during diastole (IVSTd) (cm), internal left ventricular diameter during diastole (ILVDd) (cm), left ventricular free wall thickness during diastole (LVFWTd) (cm), internal left ventricular diameter during systole (ILVDs) (cm), ratio between the peak velocity of the E and A waves of the mitral valve (E/A), isovolumic relaxation time (IVRT), ratio between the peak velocity of the lateral E' and A' waves (lat E'/A'), ratio between the peak velocity of the medial E' and A' waves (med E'/A') at baseline (M0) and during sedation (M1).
The transmitral E and A waves velocities, E/A ratio, E wave deceleration time (DT), and the isovolumic relaxation time (IVRT) were measured using the conventional two dimensional and pulsed wave Doppler.
This value can be calculated by, dividing the sum of isovolumic contraction time and isovolumic relaxation time by the ejection time and extracting the LV ejection time from the time interval between the ending and the beginning of mitral flow for the LV and dividing it by the ejection time [15].
Diastolic function was assessed by determining the velocities of early (E) and late (A) diastolic transmitral flow, the ratio E-to-A (E/A), deceleration time (DT), isovolumic relaxation time (IVRT), and pulmonary vein flow velocities.
The results for right heart showed that Z scores for peak E velocity, peak A velocity, pre- ejection period, isovolumic relaxation time, myocardial performance index and isovolumic contraction time were significantly different (pless than 0.
Analysis of Left Ventricular Surface Deformation during Isovolumic Contraction.
The authors observed that in the subjects demonstrating an increase in Hbmass, isovolumic haemodilution elicited a 5.
Belova revealed the presence of diastolic dysfunction, later filling of the left ventricle and increased isovolumic relaxation period revealed in 120 young persons with LSBP [12].
On the other hand, it would be better, if they also evaluated right ventricular function using several parameters including right ventricular index of myocardial performance, tricuspid annular plane systolic excursion, and myocardial acceleration during isovolumic contraction, right ventricular fractional area change.