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To analyze the correlation of the Poincaré plot descriptors of RR intervals with standard measures of heart rate variability (HRV) and spontaneous baroreflex sensitivity (BRS). A physiological model of changing respiratory rates from 6 to 15 breaths/min provided a wide range of RR intervals for analysis.

Correlations between the Poincaré Plot and Conventional Heart Rate Variability Parameters Assessed during Paced Breathing