QT INTERVAL IN SIDS/Kelly, Shannon, Liberthson

If A2r, B2J, and the turbulent portion of the signal is of relatively low frequency, i.e., T2-T1, the autocorrelation appears as in figure 2b. If the two time scales are not readily apparent, as in figure 2b, T0 is the correct turbulent scale and the function's width is determined on the axis at point P. The pattern in figure 2b is differentiated from that of figure lb, which has no information about constriction, because figure 2b displays a sharp, triangular peak with straight sides. Figure 2b is observed in tortuous arteries with minimal occlusion and was produced by the kinked artery previously illustrated in text (fig. 5).