Figure 3

Transfer function of a 6-s time window of PatID 6. Analysis of one 6-s time window of PatID 6 showing (a) the signals 1(Codman) and 2 (dash-dot line, Edwards), (b) transfer function of magnitude, and (c) transfer function of phase with dash-dot line indicating estimate based on a delay of 0.065 sec. In this case, 47.1% of 6-s time windows showed a difference in MWA > 1 mmHg (largest MWA in Signal 1 in 18.9% and largest MWA in Signal 2 in 28.2%). In 12.8% of 6-s time windows, the difference in MWRT was > 0.1 sec (largest MWRT in Signal 1 in 12.7% and largest MWRT in Signal 2 in 0.1%).