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

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 ?
They found a positive correlation between FEV1 and isovolumetric relaxation time (IVRT) and mitral ET; also, PEF was negatively correlated with myocardial fiber stresses (MFS, g/[cm.sup.2]), such as the RV and LV work index.
Isovolumetric relaxation times was higher in the type 1 DM group as compared to the control group (p<0.001) (Table 2).
Table 3--Mean values and standard deviation of the relation between the peak velocity of the E and A waves of the mitral valve (E / A), isovolumetric relaxation time (IVR), the relationship between the lateral velocity peak E 'and A (E '/ A'lat), the relationship between the peak velocity of the medial E' and medial A' waves (E '/ A'med), measured by echocardiography at baseline (M0) and during sedation (M1).
(6) An isovolumetric gas was released during desorption, and the resistance of the coal sample was measured after each adsorption rebalancing.
Early (E) and late (A) diastolic velocities, velocity time integrals and ratios of early and late velocities, velocity time integrals (E/A) as well as isovolumetric relaxation time was determined.
Viscosity is mainly dependent upon the hematocrit and plasma fibrinogen, and isovolumetric hemodilution does also positively impact it [23].
Diastolic performance was evaluated using the mitral diastolic flow pattern parameters (E and A waves [early and late diastolic peak filling velocities]), E/A waves' ratio, mitral E wave deceleration time (EDT), isovolumetric relaxation time (IVRT) [6], and tissue Doppler at the mitral annulus (septal and lateral).
The rats in the blank control group were injected with isovolumetric normal saline (no.
Ejection fraction and isovolumetric relaxation time were not altered in pioglitazone, but E/A ratio and ventricular hypertrophy were both slightly improved.
Early (E) and late (A) wave velocities ratio (E/A), deceleration time (DT), and isovolumetric relaxation time (IVRT) were measured from the mitral inflow profile.
MPI has been increasingly used to assess both systolic and diastolic function of ventricles and is defined as the sum of isovolumetric cardiac activity divided by ET and could be measured for right and left heart separately.12-14