Tissue Doppler echocardiography measurement of myocardial performance index correlated highly with conventional pulse Doppler in healthy subjects (r=0.94) and DCMP patients (r=0.95, P<0.0001).
Cross-Sectional (n=30)
Does pulsed-wave tissue Doppler echocardiography accurately measure the myocardial performance index compared to the conventional pulse Doppler method in normal subjects and patients with dilated cardiomyopathy?
Pulsed-wave tissue Doppler echocardiography is a reliable method for measuring the myocardial performance index, showing excellent correlation with the conventional pulse Doppler method in both healthy individuals and patients with dilated cardiomyopathy.
Effect estimate: r = 0.94 to 0.95
p-value: p=<0.0001
A simple, reproducible, noninvasive myocardial performance index (MPI) for the assessment of overall cardiac function has been described previously. The purpose of this study was to compare the MPI obtained by pulse Doppler method with the MPI obtained by tissue Doppler echocardiography (TDE) in normal subjects and patients with dilated cardiomyopathy (DCMP). Fifteen patients with DCMP and 15 healthy subjects were included. In order to calculate MPI by TDE, isovolumetric contraction (IVCT), relaxation time (IVRT), and ejection time (ET) were measured at two different sites of mitral annulus: septum and lateral. MPI was calculated by dividing the sum of IVCT and IVRT by ET at each site of measurement. The mean MPI value was found by dividing the sum of these MPI values into two. The same parameters were measured using the mitral inflow and left ventricular outflow velocity time intervals in pulsed Doppler method. At all sites measured, MPI by TDE correlated well with conventional MPI both in healthy subjects and patients with DCMP. The highest correlation was observed in mean values of MPI by TDE:r = 0.94, P < 0.0001in healthy subjects; andr = 0.95, P < 0.0001in patients with DCMP. In conclusion, this study clearly demonstrated that MPI could be measured by TDE and it correlated well with conventional MPI in normal and diseased heart.
Tekten et al. (Mon,) conducted a cross-sectional in Dilated cardiomyopathy (DCMP) (n=30). Tissue Doppler echocardiography (TDE) vs. Pulse Doppler method was evaluated on Correlation between MPI by TDE and conventional MPI (r = 0.94 to 0.95, p=<0.0001). Tissue Doppler echocardiography measurement of myocardial performance index correlated highly with conventional pulse Doppler in healthy subjects (r=0.94) and DCMP patients (r=0.95, P<0.0001).
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