| 摘要 |
PURPOSE: A method of processing signals for monitoring continuous cardiac variables is provided to monitor correctly the cardiac variables by setting up start points of each frame as peak points of impedance signals. CONSTITUTION: An initialization process for cardiac cycles is performed. A minimum R·R interval in each stage is detected and a window size is determined. An upper and a lower threshold level are determined. The window is applied to a dz/dt wave at the beginning of QRS. The largest peak dz/dt is detected. The upper level, the peak dz/dt, and the lower level are compared to each other. The data of current cycles is added to the previous ones. The summed data are divided into N.
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