Baroreflex analysis in diabetes mellitus: linear and nonlinear approaches

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Authors

JAVORKA Michal LAZAROVA Zuzana TONHAJZEROVA Ingrid TURIANIKOVA Zuzana HONZÍKOVÁ Nataša FIŠER Bohumil JAVORKA Kamil BAUMERT Mathias

Year of publication 2011
Type Article in Periodical
Magazine / Source Medical & Biological Engineering & Computing
MU Faculty or unit

Faculty of Medicine

Citation
Doi http://dx.doi.org/10.1007/s11517-010-0707-x
Field Other medical specializations
Keywords Baroreflex sensitivity; Diabetes mellitus; Nonlinear analysis; Synchronization
Description 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.
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