Mitral 'E' velocity (peak velocity of early mitral flow), mitral 'A' velocity (peak velocity of late mitral flow), E/A ratio (velocity of diastolic early filling wave/velocity of late filling wave), annular tissue motion (denoted by e'), E/e' ratio, Isovolumic Relaxation Time (IVRT), deceleration time
of mitral 'E' curve (DT of E) and left atrial diameter was calculated to find the presence of left atrial enlargement.
Detailed cardiac echocardiography was performed to determine left atrial volume, ejection fraction, E and A velocities, deceleration time
and e'velocity, E/e.
Mitral E velocity (ME), mitral A velocity (MA), mitral E wave deceleration time
(MEDT), and LV isovolumic relaxation time (IVRT), defined as time period between the termination of aortic systolic wave and beginning of ME, were measured by locating the sampling volume cursor of pulsed Doppler in the apical four chamber position at 5 mm above the mitral leaflets tips.
The values of the measurements obtained by ultrasound were also significant between the two groups: deceleration time
(DT, msec) 217.
Diastolic indices included: early and late transmitral diastolic velocities (E and A); early deceleration time
(DT); systolic velocity ([S.
There was no correlation between mean Em velocity and deceleration time
5 in association with short deceleration time
less than 130-150 msec.
Other features include valuable local keypad control appointments, acceleration time, deceleration time
, direction start/stop and stop method (controlled stop or coast).
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).
If the deceleration time
of the mitral P wave is 115 milliseconds or more, then the 30-month survival is 100%.
A restrictive mitral-filling pattern--as evidenced by a shortened deceleration time
of early mitral inflow and/or an elevated ratio of early to late diastolic filling--is a powerful predictor of functional capacity, which correlates with survival.