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Example sentences for: hrr

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Therefore, we focused on respiratory sinus arrhythmia (RSA) in order to derive statistical information on cardiorespiratory coordination without respiratory flow measurements - see Footnote 2. In earlier studies we could show that the statistical evaluation of the 'musical rhythmicity' of heart rate (HRR), i.e. the predominance and cyclicity of so-called phase locking pattern classes in binary differential heart rate dynamics (binary RR differences), has certain advantages over other linear or nonlinear heart rate variability analytic tools [ 19 20 21 22 ] . Evidence was given that HRR reflects mainly the degree of cardiorespiratory coordination and also enables the determination of the weighted phase coordination ratio (PCR) that corresponds to the frequency ratio of heartbeat and respiration during intermittent periods of apparent cardiorespiratory coordination.
Binary pattern analysis, which has been also denoted as 'musical heart rate rhythmicity' (HRR), is primarily based on simple binary coding of instantaneous heart rate fluctuations.
A detailed description of the HRR method can be found in [ 19 ] which can be downloaded free of charge from the website http://ajpheart.physiology.org/cgi/content/abstract/277/5/H1762.