Objective: The evaluation of diagnostic value of pulsed tissue Doppler (TD) parameters (calculated from six points of mitral annulus and separately measured in the lateral part of mitral annulus) for the detection of pseudonormal mitral inflow pattern.
Methods and results: Among 200 persons examined by transthoracic echocardiography group with E/A value between 1 and 2 was selected and divided to normal (54 subjects, early wave deceleration time, Edt > or = 150 msec) and pseudonormal (23 patients, Edt < 150 msec together with prolonged difference between duration of atrial reversal flow in pulmonary vein and mitral flow in atrial phase, delta Ar > or = 20 msec) inflow. Wide spectrum of TD parameters was compared between the selected groups. In normal inflow, average peak velocities of early and atrial phase of diastolic mitral annulus motion were significantly higher: 11.0 +/- 2.6 versus 8.9 +/- 3.5 cm/sec; (P = 0.005) and 12.0 +/- 2.2 versus 10.0 +/- 3.0 cm/sec; (P = 0.002), respectively. Ratio of peak early mitral wave velocity to peak velocity of annulus motion in early phase (Ev/E'v avr) was higher in the pseudonormal pattern: 9.8 +/- 3.7 versus 7.0 +/- 2.0, respectively (P < 0.001). For the value of Ev/E'v avr > 10.2, 70% accuracy for the diagnosis of pseudonormalization was detected. For the parameters measured in the lateral part of mitral annulus similar relationships in the early filling phase were detected but did not reach statistical significance in the atrial phase.
Conclusions: Pulsed TD offers good accuracy for the diagnosis of pseudonormalization with increased ratio of peak early mitral wave velocity to peak velocity of mitral annulus being the optimal predictor of advanced diastolic dysfunction.