Figure 1From: Myocardial involvement during the early course of type 2 diabetes mellitus: usefulness of Myocardial Performance Index Flow Doppler at the mitral valve and at the LV outflow tract. Measurements of the time intervals of the Myocardial Performance Index (MPI). The interval "a" is measured from the end to the onset of mitral inflow waveform; the interval "b" is the left ventricular outflow velocity tracing (ET). The MPI was calculated as (a - b)/b.Back to article page