isovolumic


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i·so·vol·u·mic

(ī'sō-vol-yū'mik),
Occurring without an associated alteration in volume, as when, in early ventricular systole, the muscle fibers initially increase their tension without shortening so that ventricular volume remains unaltered.
See also: isometric.
Synonym(s): isochoric, isovolumetric

isovolumic

/iso·vo·lu·mic/ (i″so-vah-loo´mik) maintaining the same volume.

i·so·vol·u·mic

(ī'sō-vol-yū'mik)
Occurring without an associated alteration in volume, as when, in early ventricular systole, the muscle fibers initially increase their tension without shortening so that ventricular volume remains unaltered.
See also: isometric
References in periodicals archive ?
Pozzi et al found that in cirrhotic patients with tense ascites, the A wave velocity is markedly increased, the E/A ratio is markedly reduced and the deceleration time is significantly prolonged, whereas Wong et al reported prolonged isovolumic relaxation time in cirrhotic patients irrespective of the presence of ascites with significantly reduced E/A ratios only in ascitic subjects.
5 Isovolumic relaxation time (ms) 47 [+ or -] 15 Mitral E (cm/s) 61 [+ or -] 11 Mitral A (cm/s) 45 [+ or -] 10 E/A ratio 1.
MPI is calculated by dividing the sum of isovolumic contraction time (ICT) and isovolumic relaxation time (IRT ) by ejection time (ET ).
3) Ventricular diastole includes isovolumic relaxation, early passive filling after mitral valve opening, and active filling during atrial contraction.
The later parameter is calculated as: MPI= (IVRT+IVCT)/ET, in which, IVRT is Isovolumic Relaxation Time, IVCT is Isovolumic Contraction Time and ET is ejection time.
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.
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," he noted.
Diastolic parameters assessed included isovolumic relaxation time, mitral inflow peak E-wave velocity, peak A-wave velocity, the ratio of E-wave to A-wave velocity, and E-wave deceleration time.
We measured left ventricle Ejection Fraction (EF) and Fractional Shortening (FS) to survey left ventricle systolic function, and left ventricle Isovolumic Relaxation Time (LV IVRT) and also Early rapid filling/Atrial contraction (E/A ratio) in mitral valve blood flow to survey left ventricle diastolic function.
The mean Em velocity was correlated well with isovolumic relaxation time.
Isovolumic relaxation time and isovolumic contraction time from the basal part of the left ventricle, myocardial rate during the systole, myocardial rate during the erly diastole, the rate during the late diastole, ejection time, isovolumic contraction acceleration and acceleration of the ventricle at the time of isovolumic contraction were measured.