isovolumic


Also found in: Medical.

isovolumic

[¦ī·sō¦väl·yə·mik]
(physics)
Mentioned in ?
References in periodicals archive ?
Analysis of Left Ventricular Surface Deformation during Isovolumic Contraction.
20) MPI, also known as "Tei index" was calculated from IVRT, isovolumic contraction time and ejection time (15) (MPI=IVRT+isovolumic contraction time/ejection time).
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.
We can measure isovolumic contraction time, isovolumic relaxation time, and ejection time, and develop in 30 seconds not only rate, rhythm, variability but now a modified Tei index, an index of performance, and as many papers have said, an index of preload status.
The results showed that there were a good agreement for mitral inflow E and S, deceleration time, isovolumic relaxation and contraction times, myocardial performance index, ejection time, systolic and diastolic mitral annular pulse-wave velocities from TTE and TEE.
Peak early filling velocity (E wave), peak atrial systolic velocity (A wave), early-to-late diastolic flow ratio (E/A), deceleration time (dTE), isovolumic relaxation time (IVRT) and isovolumic contraction time (IVCT) were measured for the tricuspid valve (26).
In addition, the records of pulse waves from carotid and femoral sites using SphygmoCor system should be performed at short notice to avoid from heart rate variability and isovolumic period alterations.
In this study, they evaluated peak isovolu-mic velocity, isovolumic acceleration during isovolumic contraction, ejection and diastolic E and A velocities from data obtained through TTE and TEE-TDI.
Right ventricular function can be assessed echocardiographically by using several parameters including right ventricular index of myocardial performance (RV MPI), tricuspid annular plane systolic excursion (TAPSE), myocardial acceleration during isovolumic contraction (RV IVA), right ventricular fractional area change (RV FAC), three-dimensional ejection fraction (3D RVEF), tissue Doppler-derived tricuspid lateral annular systolic velocity (Tri S), and longitudinal strain and strain rate (3).