Methods Inf Med - Information transfer through the spontaneous baroreflex in healthy humans.

Tópicos

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Resumo

JECTIVES: This study assesses the information transfer through the spontaneous baroreflex (i.e. through the pathway linking systolic arterial pressure to heart period) during an experimental condition soliciting baroreflex (i.e. head-up tilt).METHODS: The information transfer was calculated as the conditional entropy of heart period given systolic arterial pressure using a mutual neighbor approach and uniform quantization. The information transfer was monitored as a function of the forecasting time k.RESULTS: We found that during head-up tilt the information transfer at k = 0 decreased but the rate of rise of information transfer as a function of k was faster.CONCLUSIONS: We suggest that the characterization of the information transfer from systolic arterial pressure to heart period might complement the traditional characterization of the spontaneous baroreflex based on transfer function analysis.

Resumo Limpo

jectiv studi assess inform transfer spontan baroreflex ie pathway link systol arteri pressur heart period experiment condit solicit baroreflex ie headup tiltmethod inform transfer calcul condit entropi heart period given systol arteri pressur use mutual neighbor approach uniform quantiz inform transfer monitor function forecast time kresult found headup tilt inform transfer k decreas rate rise inform transfer function k fasterconclus suggest character inform transfer systol arteri pressur heart period might complement tradit character spontan baroreflex base transfer function analysi

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