Global versus local linear beat-to-beat analysis of the relationship between arterial pressure and pulse transit time during dynamic exercise
作者： A. Porta , C. Gasperi , G. Nollo , D. Lucini , P. Pizzinelli
DOI: 10.1007/S11517-006-0042-4
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摘要: Global linear analysis has been traditionally performed to verify the relationship between pulse transit time (PTT) and systolic arterial pressure (SAP) at level of their spontaneous beat-to-beat variabilities: PTT SAP have plotted in plane (PTT,SAP) a significant correlation found. However, this is weak specific individuals cannot be This result prevents utilization SAP–PTT derive changes from measures on an individual basis. We propose local approach study relationship. based definition short sequences characterized by increase (decrease) decrease (increase) search series. was applied series derived 13 healthy humans during incremental supine dynamic exercise (at 10, 20 30% nominal maximum effort) compared global approach. While failed some subjects, allowed extraction gain all subjects both rest exercise. When analyses were successful, more negative than one as likely noise reduction.
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