Table 1.
Population characteristics in participants without cardiovascular disease or cardiovascular risk factors obtained from the derivation cohort (group A, n = 974).
Table 2.
Normal values of the cardiac time intervals by TDI M-mode in healthy participants stratified according to age category and gender obtained from the derivation cohort (group A, n = 974).
Fig 1.
Cardiac time intervals assessed by a color tissue Doppler imaging (TDI) M-mode line through the mitral leaflet.
Left: Four-chamber gray-scale (bottom) and color TDI (top) views in end-systole displaying the position of the M-mode line used for measuring the cardiac time intervals. Right: Color diagram of the TDI M-mode line through the mitral leaflet. MV = Mitral Valve; MVC = MV Closing; AVO = Aortic Valve Opening; AVC = Aortic Valve Closure; MVO = MV Opening.
Fig 2.
The expected cardiac time intervals according to age and gender in participants without cardiovascular disease or cardiovascular risk factors.
Depicting the expected values of the cardiac time intervals with increasing age for participants stratified according to gender. Dotted curves indicate 95% confidence intervals. IVCT = Isovolumic Contraction Time; IVRT = Isovolumic Relaxation Time; ET = Ejection Time; MPI = Myocardial Performance Index.
Table 3.
Population characteristics in the validation cohort undergoing left heart catheterization (group B, n = 44).
Table 4.
The association between MPITDI and MPIConv, and invasive and echocardiographic measures of systolic and diastolic obtained from the validation cohort (group B, n = 44).
Fig 3.
The scatter plots for MPITDI and MPIConv according to the values of dP/dt max and dP/dt min, respectively.
Depicting the scatter plots and the expected values for MPITDI and MPIConv according to the values of dP/dt max (Fig 3a) and dP/dt min (Fig 3b), respectively. Dotted curves indicate 95% confidence intervals. dP/dt max = the rate of LV pressure rise in early systole; dP/dt min = the rate of LV pressure decline in early diastole; MPITDI = Myocardial Performance Index by TDI M-mode; MPIConv = Myocardial Performance Index by the conventional method.
Table 5.
Diagnostic accuracy of MPITDI for diagnosing impaired systolic and/or diastolic function in the validation cohort (group B, n = 44).