Med Biol Eng Comput - Baroreflex analysis in diabetes mellitus: linear and nonlinear approaches.

Tópicos

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Resumo

The aim of our study was to employ novel nonlinear synchronization approaches as a tool to detect baroreflex impairment in young patients with subclinical autonomic dysfunction in Type 1 diabetes mellitus (DM) and compare them to standard linear baroreflex sensitivity (BRS) methods. We recorded beat-to-beat pulse interval (PI) and systolic blood pressure (SBP) in 14 DM patients and 14 matched healthy controls. We computed the information domain synchronization index (IDSI), cross-multiscale entropy, joint symbolic dynamics, information-based similarity index (IBSI) in addition to time domain and spectral measures of BRS. This multi parametric analysis showed that baroreflex gain is well-preserved, but the time delay within the baroreflex loop is significantly increased in patients with DM. Further, the level of similarity between blood pressure and heart rate fluctuations was significantly reduced in DM. In conclusion, baroreflex function in young DM patients is changed. The quantification of nonlinear similarity and baroreflex delay in addition to baroreflex gain may provide an improved diagnostic tool for detection of subclinical autonomic dysfunction in DM.

Resumo Limpo

aim studi employ novel nonlinear synchron approach tool detect baroreflex impair young patient subclin autonom dysfunct type diabet mellitus dm compar standard linear baroreflex sensit brs method record beattobeat puls interv pi systol blood pressur sbp dm patient match healthi control comput inform domain synchron index idsi crossmultiscal entropi joint symbol dynam informationbas similar index ibsi addit time domain spectral measur brs multi parametr analysi show baroreflex gain wellpreserv time delay within baroreflex loop signific increas patient dm level similar blood pressur heart rate fluctuat signific reduc dm conclus baroreflex function young dm patient chang quantif nonlinear similar baroreflex delay addit baroreflex gain may provid improv diagnost tool detect subclin autonom dysfunct dm

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