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. 2009 Feb 4;296(4):R1088–R1097. doi: 10.1152/ajpregu.90862.2008

Fig. 2.

Fig. 2.

RI and RE time series are classified according to 4 coupling patterns. These patterns exhibit different linear and chaotic dynamics. Time series for patterns A to D are given (left) and the corresponding heart rate-to-respiratory rate ratio (HR/f, right) (See Time Domain).