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What does LVIRT stand for?

LVIRT stands for Left Ventricular Isovolumic Relaxation Time

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Samples in periodicals archive:

In a study performed by Baysal et al (26) in 20 subjects with pediatric tumor, left ventricular isovolumic contraction time and left ventricular isovolumic relaxation time values were found to be longer in patients who received anthracycline treatment compared to the control group.
8 in individuals >55 years, DT >220 ms, IRT >100 ms; pseudonormal: 1 < E/A < 2,150 ms < DT < 200 ms, IRT <100 ms; restrictive filling, E/A >2, DT <150 ms, IRT <60 ms, where E is the peak E-wave velocity and A is the peak A-wave velocity of the mitral inflow, DT is the deceleration time of the E wave, and IRT is the left ventricular isovolumic relaxation time (13).