Analysis of correlation between heart rate and blood pressure

The paper presents an analysis of correlation between heart rate (HR) and blood pressure (BP). The actual data were obtained from three female and one male. The systolic and diastolic blood pressure was measured with the invasive method in the radial artery. The correlation coefficient indicates only linear dependence, so the inverse of HR was also taken into account. Since the measurements can be corrupted by noise the moving average filtering and trend analysis for all data was done. The results of the correlation analysis of this filtered data were similar to results obtained for raw data. The observed correlation coefficient between HR and BP (systolic and diastolic) for whole available data seems a random number. However the short-term correlation is relatively large (about 0.5), but rather unpredictable, since even sign of the correlation coefficient is changing.