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Correlations between the Poincaré plot and conventional heart rate variability parameters assessed during paced breathing

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Author: Guzik, P. · Piskorski, J. · Krauze, T. · Schneider, R. · Wesseling, K.H. · Wykrȩtowicz, A. · Wysocki, H.
Type:article
Date:2007
Institution: TNO Biomedical Instrumentation
Source:Journal of Physiological Sciences, 1, 57, 63-71
Identifier: 280101
doi: DOI:10.2170/physiolsci.RP005506
Keywords: Health · Baroreflex sensitivity · Heart rate variability · Paced breathing · Poincaré plot · Respiratory sinus arrhythmia · Blood pressure · Breathing · Breathing rate · Calculation · Correlation analysis · Correlation function · Electrocardiogram · Heart rate variability · Physiology · Plots and curves · Poincare plot · Pressoreceptor reflex · RR interval · Statistical significance · Time · Volunteer · Biological model · Breathing mechanics · Cardiovascular function · Comparative study · Electrocardiography · Evaluation · Methodology · Reference value · Reproducibility · Respiratory function · Vascularization · Adult · Baroreflex · Blood Pressure · Cardiovascular Physiology · Electrocardiography · Female · Fingers · Heart Rate · Humans · Male · Models, Cardiovascular · Reference Values · Reproducibility of Results · Research Design · Respiratory Mechanics · Respiratory Physiology · Time Factors

Abstract

Aim: 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. Material and methods: Beat-to-beat finger blood pressure, ECG, and respiratory curves were recorded noninvasively in 15 young healthy volunteers (19-25 years old; 7 females) breathing for 5 min at 4 different respiratory rates of 6, 9, 12, and 15 breaths/ min. Four descriptors of the Poincaré plot (SD1, SD2, S, and SD2/SD1), time and frequency domain HRV, and spontaneous BRS (cross-correlation method) were calculated for each 5-min recording. Results: The values of SD1 characterizing short-term HRV, SD2 describing long-term HRV, and S measuring total HRV were significantly correlated with BRS and time and frequency domain measures of short, long, and total HRV. The LF/ HF significantly correlated with SD2 and SD2/SD1 representing the balance between long- and short-term HRV. None of the Poincaré plot descriptors was correlated with the mean RR interval. The increased respiratory rate caused a significant reduction of BRS, measures of total and long-term HRV, and an increase of HF that peaked at 12 breaths/min. Conclusions: The descriptors of the Poincaré plot of RR intervals are significantly correlated with measures of BRS and time and frequency domain HRV, but not with heart rate. A faster respiratory rate reduces long-term HRV measures and temporarily increases HF.