Poincaré plot descriptors correlate with conventional HRV parameters during paced breathing, highlighting the impact of respiratory rate on HRV measures.
Respiratory rate should be standardized in HRV assessment; hypothesis-generating for Poincaré plots as BRS correlates pending prospective validation.
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.
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Guzik et al. (2007) studied this question.
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