isovolumic

(redirected from isovolumetric)
Also found in: Encyclopedia.

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 ?
AS-Ex and AS-C groups had decreased posterior wall shortening velocity, TDI systolic velocity of the mitral annulus, mitral A wave, isovolumetric relaxation time, and E wave deceleration time and increased mitral E wave, E/A ratio, and E wave/TDI early average mitral annulus diastolic velocity compared to respective controls.
890 LV: Left ventricular; LVEF: Left ventricular ejection fraction; E: Mitral early diastolic velocity; A: Mitral late diastolic velocity; DT: Mitral E-wave deceleration time; LA: Left atrium; IVRT: Isovolumetric relaxation time; [IVST.
Isovolumetric bladder contractions probably occurred during ongoing urgency to void, while bladder volume remained constant.
The determined accuracy of the PTT is affected by isovolumetric ventricular contraction time (PEP), which is the time between the ECG R-wave peak and the pressure change beginning in the aorta.
The characteristics of the different transvalvular flows and normal values for the lefi ventricle isovolumetric relaxation time (IVRT), the peak velocity (Vp) and ventricular ejection time (Tey) for the sigmoid valves flow, were also established.
Preservation of parent rock fabric in saprolite due to in situ isovolumetric weathering (Nahon 1991) may be responsible for the higher values of dry and wet strength.
However, theoretical considerations and experimental evidences indicate that the transformation of anhydrite into gypsum is a highly time-consuming isovolumetric process in which anhydrite is dissolved as fast as secondary gypsum precipitates (e.
O'Beirne-Ryan and Zentilli (2003) pointed out that many of these horizons no longer exhibit isovolumetric weathering and therefore are no longer "saprolites" senso stricto.
Isovolumetric relaxation time and tissue Doppler e' (early diastolic tissue velocity) fell while the ratio of mitral inflow velocity E to e' rose with increasing BMI, suggesting depressed myocardial relaxation properties and increased left ventricular filling pressures.
When protein is provided as a 50-g dose in the form of a beverage and compared with an isocaloric, isovolumetric and palatability-matched carbohydrate beverage, protein has also been shown to be more satiating than glucose.